Work Lights Dictionary - NORDIC LIGHTS® - Nordic Lights Ltd.

Work Lights Dictionary

Explore the terminology behind professional work lighting. The Nordic Lights Dictionary explains key concepts related to LED work lights, light patterns, optics, electrical performance, durability, and heavy-duty applications. Whether you are specifying a lighting solution, comparing products, or simply exploring the technology, you’ll find clear definitions of the terms used throughout our website and product documentation.

Zone Lighting

Zone lighting divides a machine or worksite into functional areas that can be illuminated and, where supported, controlled separately. Typical zones include the travel path, attachment or tool, loading area, sides, rear, access steps, and service points. The required lights and patterns depend on the application and operating conditions. Separate control can let the operator activate only the areas relevant to travel, loading, reversing, servicing,...

Work Envelope Lighting

Work envelope lighting illuminates the full area in which a machine, attachment, load, and nearby personnel operate. A suitable setup combines light patterns and mounting positions to cover travel, task, and peripheral zones while controlling glare and shadows. It is a lighting-design approach rather than a single lamp specification. The envelope changes as booms, buckets, forks, cranes, or other attachments move, so a fixed forward-facing...

Wattage

Wattage is the electrical power used by a device, expressed in watts (W). In Nordic Lights technical data, the preferred label is Power Consumption. Wattage does not indicate light output by itself; compare it with operational lumens, luminous efficacy, and the required light pattern. Power consumption is needed for sizing alternators, batteries, wiring, connectors, fuses, and control devices. Two lamps with the same wattage can...

Waterproofing

Waterproofing is a general description of measures used to limit water ingress. For technical claims, use the product’s exact IP rating instead. Nordic Lights commonly lists both IP68 and IP6K9K because immersion and high-pressure, high-temperature water-jet resistance are evaluated under different tests. An enclosure’s resistance depends on seals, joints, lens bonding, cable entries, connectors, and correct installation. Damage, incorrect assembly, pressure washing at unsuitable distances,...

Warm-Up Time

Warm-up time is the time a light source needs after switch-on to reach its specified stable light output. HID lamps may require seconds or minutes to warm up and may need restrike time after being switched off. LEDs normally provide useful light almost immediately. Warm-up behavior affects applications that need full output immediately or switch lighting frequently. Ambient temperature and lamp condition can influence discharge-lamp...

Voltage Range

Voltage range is the span of supply voltage within which a product is designed to operate. In Nordic Lights product data, the preferred label is Input Voltage DC. It must be distinguished from Nominal Voltage DC, which identifies the intended vehicle-system class. The available voltage at a lamp can vary because of battery state, alternator output, cable losses, and switching events. A product must remain...

Vibration Resistance

Vibration resistance is a product’s ability to continue operating and remain mechanically intact during specified vibration exposure. Nordic Lights states vibration capability in Grms together with a frequency range, because a Grms value without the test range and method is incomplete. Shock resistance is a related but separate specification. Vibration can loosen fasteners, fatigue brackets and conductors, damage solder joints, shift optics, and compromise seals....

UV Radiation

Ultraviolet (UV) radiation is electromagnetic radiation with wavelengths shorter than visible light. Sunlight is a major source, and UV exposure can degrade plastics, coatings, and other materials. Lens and housing materials may therefore be tested or treated for UV resistance. UV output and UV resistance are separate properties. UV-A, UV-B, and UV-C occupy different wavelength ranges and have different sources and effects. Outdoor equipment is...

Track Dozer

A track dozer is a bulldozer that runs on continuous tracks. The tracks provide traction and distribute machine weight over soft, uneven, or rough ground. Track dozers are used for pushing, ripping, clearing, and grading in mining, construction, and forestry. Tracks improve flotation and traction but the machine may still work on steep slopes, loose material, or near drop-offs. The operator needs to see the...

Tower Crane

A tower crane is a fixed, tall crane with a vertical mast and rotating jib, used mainly on construction sites. Lighting supports the hook and load path, jib, access points, working level, and areas around the crane while minimizing glare to the operator and surrounding workers. The operator may need visibility from a high cab to the hook, load, landing area, and building structure over...

Toughened Glass

Toughened glass is glass strengthened by controlled heat treatment and is also called tempered glass. Nordic Lights commonly uses Tempered glass in work-light descriptions and may use Hardened Glass in some product data. It offers good scratch, heat, chemical, and UV resistance, but the specified lens material is product-specific. If broken, fully tempered glass generally fragments differently from ordinary annealed glass because of internal stresses...

Thermal Shock Resistance

Thermal shock resistance is the ability of a lamp and its materials, seals, and joints to withstand rapid temperature changes without cracking, leakage, deformation, or functional failure. It is verified under defined test conditions and should not be inferred only from the normal operating-temperature range. Rapid transitions can create different rates of expansion in glass, plastics, metals, adhesives, coatings, and electronic assemblies. Repeated stress may...

Thermal Management

Thermal management controls heat within a lamp through component selection, electronic control, heat conduction, and dissipation through the housing. It helps maintain light output and protects the LEDs and electronics. Nordic Lights product data may also state operating-temperature limits and overheat protection. LED output and lifetime are strongly affected by junction temperature. A robust design moves heat through the circuit board and housing and may...

Theoretical Lumens Output

Theoretical Lumens Output is the calculated sum of the LEDs’ nominal luminous flux before losses in the driver, optics, lens, and thermal operating conditions are taken into account. It is an upper-reference value and should not be treated as the complete lamp’s delivered output. See Operational Lumens Output. The value may be obtained by multiplying the nominal output of one LED by the number of...

Tele Handler

Telehandler is the preferred spelling of telescopic handler. It is a lifting machine with a telescopic boom that can carry forks, buckets, platforms, or other attachments. It combines reach with off-road mobility for construction, agriculture, and material handling. The boom can extend forward and upward, allowing the machine to place loads where a conventional forklift cannot reach. Capacity decreases as reach and height increase, so...

Straddle Carrier

A straddle carrier is a mobile container-handling vehicle that drives over a container, lifts it within its frame, and transports or stacks it. Lighting supports container alignment, travel, corner visibility, access areas, and warning functions in busy terminals. The elevated cab and tall frame create long viewing distances and potential blind areas around the wheels and load. The operator needs to see container corners, travel...

Spot Beam

Spot beam is an industry term for a narrow light pattern that concentrates intensity for longer-range visibility. Nordic Lights generally uses product-specific pattern names such as High Beam or Pencil Beam for narrow, long-reaching patterns, so the specified Nordic Lights name should be used when referring to a particular product. Such a pattern is useful when the operator must identify objects well ahead of the...

Skid Steer Loader

A skid steer loader is a compact machine whose left and right wheels or tracks can be driven at different speeds, allowing it to turn within a very small area. Lift arms accept buckets and other attachments for loading, digging, grading, and material handling. The compact footprint and skid-steering method suit confined sites but can create frequent direction changes and close work around obstacles. Attachments...

Shovels

In mining, shovels are large excavation machines that dig and load rock or ore into haul trucks. They may be hydraulic or electric rope shovels. Lighting is required around the bucket, face, loading area, travel path, access points, and service areas. The bucket and working face can be far from the operator, and the loaded material may block sightlines. Lighting needs to reveal digging depth,...

RTG (Rubber-Tired Gantry)

A rubber-tired gantry crane (RTG) is a mobile gantry crane that runs on tires and straddles container rows in a terminal. It lifts, moves, and stacks containers. Lighting supports travel lanes, container alignment, lifting operations, access areas, and nearby personnel. Unlike a rail-mounted gantry, an RTG can reposition between container blocks using its tire-mounted undercarriage. Operators work at height and must align the spreader accurately...

RoHS Compliance

RoHS compliance means that applicable electrical and electronic equipment meets the substance restrictions in the EU Restriction of Hazardous Substances Directive, including its amendments and any applicable exemptions. It limits specified hazardous substances; it does not by itself certify overall environmental performance or product quality. The directive covers defined categories of equipment placed on the EU market and sets maximum concentration values for restricted substances...

Retrofit

A retrofit replaces or upgrades an existing light while retaining much of the original vehicle or installation. An LED retrofit must match the electrical system, connector, mounting, space, light pattern, and required approvals; similar dimensions or higher lumens alone do not ensure a suitable replacement. The replacement should deliver the correct illumination for the operator rather than simply reproduce the old lamp’s appearance. Installers should...

Reflector

A reflector is an optical component that redirects light from the source into the required light pattern. Its shape and reflective surface influence beam width, intensity, uniformity, and stray light. Reflectors may be used alone or together with lenses and other optics. Different reflector geometries can create narrow, wide, asymmetric, or shaped distributions. Surface accuracy and reflectivity affect efficiency and control, while contamination or damage...

Reach Stacker

A reach stacker is a mobile container-handling vehicle with a telescopic boom and spreader. It lifts, transports, and stacks intermodal containers in ports, terminals, and yards. Lighting supports container engagement, stacking, travel paths, and visibility around the machine. The boom allows the machine to place containers beyond the first row and at different stack heights. The operator must judge distance, alignment, twist-lock engagement, and surrounding...

Quake Dampening

QUAKE Dampening is Nordic Lights’ vibration-protection system for demanding applications. Its dampeners are arranged so shock and vibration forces are distributed through the system instead of loading all axes in one line. This reduces stress on the work light, internal components, and mounting point. Capability is stated for each product in Grms and frequency range. This construction is intended for machines exposed to severe mechanical...

Pulse Width Modulation (PWM)

Pulse Width Modulation (PWM) controls average power by switching the supply on and off rapidly. The duty cycle—the proportion of time the signal is on—sets the average current and perceived light output. Nordic Lights uses PWM dimming on compatible products; the permitted frequency and electrical limits are product-specific. Because the LED is repeatedly switched rather than operated at a continuously reduced voltage, PWM can provide...

Polycarbonate Lens

A polycarbonate lens, often identified as PC, is a lightweight, impact-resistant plastic lens used to protect the light and help form its light pattern. Coatings may improve scratch, chemical, and UV resistance. Lens material and coating are product-specific and should be checked in the technical data. Polycarbonate can tolerate impacts that might break glass, making it useful in forestry, construction, mining, and material handling. However,...

Photometric Data

Photometric data describes a lamp’s measured light performance, including luminous flux, luminous intensity, illuminance, and the spatial light distribution. It may be presented as light-distribution diagrams, isolux plots, intensity tables, or digital photometric files and should include the measurement conditions. This information allows designers to predict and compare how a light performs at defined distances and angles. A lumen value alone cannot show coverage, reach,...

Paving Machine

A paving machine, or paver, places and pre-compacts asphalt or concrete to form a uniform surface. It uses a hopper, conveyor, augers, and screed. Lighting supports material flow, screed operation, edges, travel, and nearby personnel during low-light work. Consistent paving requires the operator and crew to observe the material level, auger chamber, screed, mat edges, joints, and surrounding traffic. Lighting should provide broad, uniform coverage...

Overvoltage Protection

Overvoltage protection limits or withstands supply-voltage events that could damage a lamp’s electronics. It is especially important on vehicle electrical systems, where transients may occur. Protection level and test method are product-specific and should be verified in the applicable technical data or standard. Possible events include charging-system faults, switching transients, and load-dump pulses. Protection may use suppression components, control circuits, shutdown functions, or a combination...

Optics

Optics are the lenses, reflectors, light guides, diffusers, and related surfaces that control how light leaves a lamp. They form the light pattern, direct useful light to the work area, and help manage cut-off, uniformity, stray light, and glare. Well-designed optics balance width, reach, uniformity, efficiency, and glare control for a particular task. Small changes in optical geometry or surface finish can significantly change the...

Operational Lumens Output

Operational Lumens Output is the luminous flux delivered by the complete lamp under defined operating conditions. It accounts for optical, electrical, and thermal losses within the finished product and therefore represents real lamp performance more closely than theoretical lumens. Nordic Lights lists operational lumens in its product technical data. This is the appropriate lumen value for comparing the delivered flux of complete lamps when the...

Nominal Voltage DC

Nominal Voltage DC is the designated vehicle-system voltage for which a product is intended, such as 12 V or 24 V direct current. It identifies the system class, not the full permitted supply range. See Input Voltage DC for the actual operating range. The nominal value is a convenient system designation rather than an exact voltage continuously present at the lamp. Charging systems, cable voltage...

Nominal Current at

Nominal Current at is a product-data label that must be completed by a voltage or operating function. It states the typical current drawn under specified nominal conditions, for example at 12 V or 24 V, and is expressed in amperes (A). It is not the same as a maximum-current limit. Current normally changes with supply voltage, lamp output mode, temperature, and electronic regulation. For this...

Mounting Bracket

A mounting bracket secures a light to a vehicle or structure and sets its position and aiming angle. The bracket, fasteners, mounting surface, and dampening system must withstand the expected shock and vibration. Nordic Lights specifies compatible mount types and hardware for each product. A bracket may offer fixed or adjustable aiming and can use pedestal, side, rear, or application-specific attachment points. Correct tightening torque...

Motograder

Motograder is another name for a motor grader, commonly shortened to grader. Nordic Lights uses graders in its application lists. A grader is a construction machine with a long adjustable blade used to shape and finish roadbeds, slopes, and other surfaces. The blade is positioned between the front and rear axles and can be raised, lowered, angled, tilted, and shifted to control the finished surface....

Modular Lighting System

A modular lighting system uses standardized, interchangeable components or light units so a vehicle manufacturer can configure functions, light patterns, mounting, and electrical connections for a specific application. The degree of modularity depends on the product platform and should not be assumed unless documented. Modularity can simplify vehicle design, product variants, assembly, service, and spare-parts management by reusing common interfaces. Different modules may provide driving,...

Mobile Crane

A mobile crane is a crane mounted on a wheeled or tracked carrier so it can move between lifting locations. It normally uses a telescopic or lattice boom. Lighting supports travel, setup, load handling, boom visibility, and work around outriggers and access points. Because the crane changes position and configuration, the relevant viewing areas vary during travel, setup, lifting, and stowing. A complete lighting plan...

Mining Truck

A mining truck is a heavy-duty vehicle used to transport ore, waste rock, or overburden at a mine. The term may cover rigid haul trucks and articulated trucks. Lighting must support travel, loading, dumping, maneuvering, and maintenance in dusty, dark, and high-vibration conditions. These vehicles carry very large loads and may operate continuously on haul roads shared with other equipment. Lighting must reveal road edges,...

Lux Meter

A lux meter is an instrument that measures illuminance at a surface in lux. For meaningful comparisons, the sensor position, orientation, distance, ambient conditions, and measurement method must be consistent and documented. The meter’s spectral response, cosine correction, range, calibration, and condition influence accuracy. Stray light and shadows from the person taking the measurement can also affect the result. For a machine or site assessment,...

Lux

Lux (lx) is the SI unit of illuminance: luminous flux received by a surface per unit area. One lux equals one lumen per square meter. Lux depends on the light pattern, distance, aiming, mounting position, and the number of lights, so lumens alone do not determine the lux at a work area. Illuminance normally decreases as distance from a source increases, although the exact result...

Luminous Efficacy

Luminous efficacy is the amount of visible light produced per unit of electrical power and is expressed in lumens per watt (lm/W). For a complete work light, use operational lumens divided by power consumption when comparing product-level efficacy. Source-level LED efficacy and complete-lamp efficacy are not directly comparable because the finished product includes driver, optical, lens, and thermal losses. Efficacy also does not describe light...

Lumen Maintenance

Lumen maintenance describes how much luminous flux a light source retains as it ages, usually expressed as a percentage of its initial output after a stated number of operating hours. It must always be read together with the stated time, test conditions, and failure criterion. Common lifetime notation such as L70 refers to the point at which maintained light output reaches 70% of its initial...

Log Handler

A log handler is a forestry or material-handling machine designed to lift, move, sort, and stack logs. It commonly uses a grapple or fork attachment on a wheeled or tracked carrier. Lighting supports safe visibility of the load, attachment, travel path, and surrounding personnel. Machines may work at sawmills, terminals, roadside landings, or forest sites where loads can obstruct the operator’s view. Lighting should help...

Lighting Mast

A lighting mast is a fixed or portable structure that raises one or more lights above the work area to illuminate a large site. It is used at construction sites, mines, ports, yards, and temporary work areas. Mast height, aiming, stability, power supply, and glare control affect the result. Raising the lights increases the area that can be covered and can reduce shadows from equipment,...

Light Pattern

Light pattern is Nordic Lights’ preferred term for the shape and distribution of light produced by a lamp. The correct pattern depends on the vehicle, mounting position, task, speed, and required viewing distance. Nordic Lights pattern names include Flood, Wide Flood, High Beam, Reverse, Glare-Free, Super Wide, and Pencil Beam where available. A suitable pattern places enough light on critical objects and surfaces while avoiding...

Light Output Ratio (LOR)

Light Output Ratio (LOR) is the ratio of the luminous flux leaving a luminaire to the luminous flux produced by its lamp or light source, expressed as a percentage. It describes optical losses within the luminaire. For integrated LED products, operational lumens and luminous efficacy are often more useful comparison values. An LOR of 100% would mean that all source lumens leave the luminaire, while...

Light Emitting Diode (LED)

Light Emitting Diode is the full name of LED. It is a semiconductor light source that converts electrical energy into light. See LED for its use in heavy-duty work and vehicle lighting. When forward current passes through the semiconductor junction, charge carriers release energy as photons. The semiconductor materials and phosphor system determine the wavelength and white-light characteristics. In a work light, an LED’s potential...

Light Bar

A light bar is a long, narrow lighting assembly containing multiple light sources. On heavy-duty vehicles it may provide auxiliary driving or work illumination. Performance depends on the light pattern, mounting position, electrical compatibility, and applicable road-use approval, not on the bar shape alone. Light bars are available in different lengths, outputs, optical configurations, and mounting styles. A longer housing does not automatically mean better...

LED

LED stands for Light Emitting Diode. It is a semiconductor device that emits light when current flows through it. In work lights, LEDs provide compact, directional, energy-efficient illumination and can offer long service life when paired with suitable optics, electronics, and thermal management. Unlike an incandescent filament, an LED produces light through electroluminescence in a semiconductor junction. Its output, color, efficiency, and lifetime depend on...

ISO 9001

ISO 9001 specifies requirements for a quality management system focused on consistent processes, meeting customer and applicable regulatory requirements, customer satisfaction, and continual improvement. Nordic Lights states that its quality management system is certified to ISO 9001:2015. The standard addresses leadership, planning, resources, operational controls, performance evaluation, corrective action, and continual improvement. Certification applies to the organization and the stated scope of its management system....

ISO 14001

ISO 14001 specifies requirements for an environmental management system that an organization can use to manage environmental responsibilities and improve environmental performance. Nordic Lights states that its environmental management system is certified to ISO 14001:2015. The standard provides a framework for identifying environmental aspects, meeting compliance obligations, setting objectives, managing risks and opportunities, monitoring performance, and pursuing continual improvement. Certification applies to the organization and...

IP Rating

An IP rating classifies the protection provided by an enclosure against access, solid particles, and water. The first digit covers solids and the second covers water. Nordic Lights commonly lists ratings such as IP68 and IP6K9K; these represent different test conditions and should be quoted exactly rather than summarized simply as waterproof. An IP code describes enclosure protection under standardized laboratory conditions, not performance under...

Input Voltage DC

Input Voltage DC is the range of direct-current supply voltage within which a product is designed to operate. Nordic Lights lists this separately from Nominal Voltage DC. A nominal 12 V or 24 V product may accept a wider input range to accommodate normal vehicle-system variation. Operating outside the stated range can cause reduced output, protective shutdown, overheating, or permanent damage. The range does not...

Ingress Protection (IPXX)

IPXX is placeholder notation for an Ingress Protection code. The first character position describes protection against access and solid objects, and the second describes protection against water; X means that a position has not been rated or stated. See IP Rating for the product’s actual code. For example, IP6X indicates the highest solid-particle protection level while leaving the water test unspecified, and IPX7 states a...

HID

HID stands for High-Intensity Discharge. An HID lamp produces light from an electrical arc in a gas-filled discharge tube and requires control gear, often called a ballast. HID lamps can provide high light output but require warm-up and restrike time and are less compact and controllable than LEDs. HID technology has been used where powerful, efficient illumination was required, including vehicle and industrial applications. Its...

Heat Sink

A heat sink conducts heat away from electronic components and releases it to the surrounding air. In an LED work light, the housing often forms part of the heat sink. Effective heat dissipation helps maintain light output and protects the LEDs and electronics from excessive temperature. Heat moves from the LED junction through the circuit board and housing before being transferred to the environment by...

Halogen

A halogen lamp is an incandescent light source in which a tungsten filament operates inside a gas-filled bulb containing a halogen. It provides immediate light and good color rendering but generally uses more power, produces more heat, and has a shorter service life than an LED work light. The halogen cycle allows the filament to operate at a higher temperature than a conventional incandescent lamp,...

Glare

Glare is a visual condition caused by excessive brightness or contrast that creates discomfort or reduces the ability to see. In heavy-duty environments it can affect operators, nearby personnel, mirrors, and cameras. Nordic Lights’ Glare-Free optics use a controlled light pattern and cut-off line to limit light at eye level. Discomfort glare causes annoyance or fatigue, while disability glare reduces visual performance by scattering light...

Forklift Truck

A forklift truck, usually shortened to forklift, is a powered industrial vehicle that lifts and transports loads using forks or another attachment. Lighting may include work lights, road lights, and safety or warning lights, depending on the operating environment and applicable requirements. Forklifts operate around loads, racking, pedestrians, doors, trailers, and other vehicles, often in spaces with rapidly changing light. Well-planned lighting helps reveal the...

Footcandle

A footcandle (fc) is a unit of illuminance equal to one lumen per square foot. One footcandle is approximately 10.764 lux. It is used mainly in countries that use imperial units; Nordic Lights technical lighting data generally uses SI units such as lux. Footcandles and lux describe the same physical quantity using different area units, so measurements can be converted between them. Illuminance at a...

Flushmount

Flushmount or Flush mount describes a work light installed into a vehicle panel, toolbox, service body, or other surface so that the light sits largely within the structure and does not obstruct the surrounding area. This type of installation can protect the lamp from impacts, create a clean exterior profile, and fit locations where a protruding bracket-mounted light would be unsuitable. The surrounding panel must...

Flood Beam

Flood, sometimes called a flood beam, is a wide light pattern for illuminating a broad work area at short to medium range. Nordic Lights uses Flood as the light-pattern name in product specifications. Wide Flood and Super Wide are separate, wider options where available. A Flood pattern emphasizes usable width and uniform illumination rather than maximum long-distance intensity. It is commonly applied around machinery, attachments,...

Feller Buncher

A feller buncher is a forestry machine that cuts standing trees and groups them into bunches for extraction. It uses a cutting head mounted on a wheeled or tracked carrier. Work lights support visibility around the cutting head, boom, travel path, and surrounding trees. The machine must operate among branches, uneven ground, vibration, dust, moisture, and frequent changes in boom position. Lighting should help the...

Engine Room

An engine room is an enclosed area that contains engines, generators, pumps, and related machinery. On large vehicles, vessels, and industrial equipment, lighting must provide reliable area and service illumination while tolerating heat, vibration, moisture, oil, and restricted mounting space. Fixtures may need to operate around hot surfaces, moving equipment, vibration, fumes, and cleaning processes. A suitable installation provides even illumination for gauges, valves, walkways,...

EMC

EMC stands for electromagnetic compatibility: a product’s ability to operate correctly in its electromagnetic environment without causing unacceptable interference to other equipment. Nordic Lights lists the applicable EMC standards and classifications, such as CISPR 25 Class 5 or UN R10, in product-specific technical data. Vehicles contain radios, sensors, control units, communication networks, and other equipment that can be affected by electromagnetic noise. At the same...

Efficiency

Efficiency describes the ratio between useful output and input. For lighting products, the more specific comparison is usually luminous efficacy, expressed in lumens per watt (lm/W). Power consumption, light pattern, optical losses, and thermal performance also affect how effectively a work light illuminates the required area. A high lm/W value means that more visible light is produced for each watt consumed, but it does not...

ECE-approved

ECE-approved means that a vehicle lighting product has received type approval under one or more applicable UN Regulations. The exact regulation and approved function must be stated, such as UN R10 for electromagnetic compatibility or UN R149 for road-illumination devices. The term does not mean that every function of the product has the same approval. Approval is identified by an approval mark and number linked...

Dual Beam

A dual-beam light provides two selectable light functions in one unit, commonly high beam and low beam, also called driving beam and passing beam. In Nordic Lights front-light applications, Dual Beam refers to combined headlight functions and should not automatically be interpreted as a combination of Flood and Spot work-light patterns. The two functions use different light distributions so the same lamp can support both...

Driver

An LED driver is the electronic circuitry that supplies and regulates power to the LEDs. In a vehicle work light, it operates from the specified DC input-voltage range and may also provide dimming, thermal control, and protection against electrical disturbances. The driver converts and controls the incoming electrical power so the LEDs receive the required current despite changes in supply voltage or temperature. Its design...

Drill Rig

A drill rig is a machine used to create holes in rock or soil for blasting, exploration, foundations, wells, or other purposes. Its size and drilling method vary by application. Lighting is typically required around the drill area, access points, controls, and service locations. Mining and construction rigs may use rotary, percussive, or combined drilling methods and can operate above ground or underground. Dust, vibration,...

Dozer

Dozer is a shortened form of bulldozer: a powerful earthmoving machine fitted with a front blade for pushing, spreading, and grading soil, rock, or other material. Dozers may run on tracks or wheels and are widely used in construction, mining, and forestry. The blade may be configured for straight pushing, angled work, or shaping material, and some machines also use a rear ripper to break...

Dimmable

Dimmable means that a lamp’s light output can be reduced and increased through a compatible control method. Nordic Lights uses pulse width modulation (PWM) for certain dimmable LED lamps. Dimming capability and the permitted control signal are product-specific and must be checked in the technical data. Dimming can reduce glare, adapt illumination to a task, save energy, and manage heat when full output is unnecessary....

Daylight Sensor

A daylight sensor measures ambient light and provides a signal that a control system can use to switch or dim lighting. It is one possible input to adaptive or smart lighting. Availability and control behavior depend on the specific lighting system. The sensor can help avoid unnecessary lighting in bright conditions and maintain a chosen illumination level as daylight changes. Placement and calibration are important...

Dampening

Dampening is the term Nordic Lights uses for systems that protect a work light from shock and vibration. In general engineering language, the process is also called vibration damping. The system absorbs and distributes mechanical energy to reduce stress on the light, its components, and the mounting point. Shock is a short-duration mechanical event, whereas vibration is repeated oscillation over time; both can damage electronics,...

DALI

DALI stands for Digital Addressable Lighting Interface, a standardized digital protocol for controlling and monitoring compatible lighting equipment. It supports functions such as switching, dimming, grouping, and status reporting. DALI is mainly associated with building lighting and should not be assumed to be available on a vehicle work light unless specified. Each addressable device can be assigned to groups and scenes, allowing centralized control without...

Crop Sprayer

A crop sprayer is an agricultural machine that applies liquid products such as fertilizers and crop-protection agents through a tank, pump, boom, and nozzles. It may be self-propelled, tractor-mounted, or trailed. Work lights support boom monitoring, field operation, maintenance, and maneuvering in low light. Accurate spraying depends on maintaining the correct boom position, coverage, speed, and nozzle performance across the field. At night or in...

Crane

A crane is a machine that lifts, lowers, and moves loads using a hoist and a boom, jib, bridge, or similar structure. Crane lighting must support safe visibility around the load, working area, access routes, and machine structure without causing glare. Different crane types include mobile, tower, crawler, overhead, and gantry cranes, each with distinct mounting and visibility needs. Suitable lighting helps the operator see...

Corrosion Resistance

Corrosion resistance is a material or product’s ability to withstand deterioration caused by moisture, salt, chemicals, and other corrosive conditions. For heavy-duty work lights, housings, coatings, fasteners, and seals all contribute. Nordic Lights product specifications may state salt-spray testing according to ISO 9227; the duration is product-specific. Corrosion can weaken components, damage finishes, affect electrical connections, and eventually compromise sealing or mechanical strength. Material selection...

Correlated Color Temperature (CCT)

Correlated Color Temperature (CCT) describes the color appearance of a white light source by comparing it with the color of a heated reference radiator. It is expressed in kelvins (K): lower values appear warmer and higher values appear cooler. CCT does not measure light output or intensity. Typical descriptions include warm white, neutral white, and cool white, although the boundaries between these categories vary. CCT...

Compact Loader

A compact loader is a small, maneuverable loading machine used to lift, carry, and move materials in confined work areas. Depending on its design, it may use wheels or tracks and accept attachments for digging, grading, sweeping, or material handling. Its small dimensions and tight turning ability make it useful in construction, landscaping, agriculture, property maintenance, and indoor or urban work areas. Attachments can extend...

Color Temperature

Color temperature describes whether white light appears warm, neutral, or cool and is expressed in kelvins (K). For LEDs, the more precise term is Correlated Color Temperature (CCT). CCT is not a measure of brightness. Nordic Lights commonly uses 5000–5700 K for work lights and offers warmer light for demanding conditions such as dust, rain, fog, or snow. Cool white light can support a crisp...

Color Rendering Index

Color Rendering Index (CRI) measures how accurately a light source reveals object colors compared with a reference light source. CRI is reported on a scale up to 100; higher values indicate more natural color rendering. Nordic Lights identifies CRI of 80 or above as suitable when precise color recognition is important. Good color rendering can help operators distinguish cables, controls, surface changes, warning markings, materials,...

Color Consistency

Color consistency describes how closely the color appearance of light matches between LEDs, lamps, and production batches, and how well it remains stable over time. LED binning and controlled manufacturing help limit visible differences in color temperature and tint. Good consistency is particularly noticeable when several work lights illuminate the same area, since differences can create visible patches of warmer, cooler, greener, or more magenta...

Candela

Candela (cd) is the SI unit of luminous intensity. It describes the amount of visible light emitted in a particular direction per unit solid angle. Candela is useful for comparing the reach and directional intensity of different light patterns. Unlike lumens, which describe total luminous flux, candela is directional. A lamp can have moderate total output but high candela if its optics concentrate the light...

Brightness

Brightness is the visual perception of how light or dark a source or illuminated surface appears. It is subjective and is not measured directly in lumens. Use luminous flux (lumens), luminous intensity (candela), or illuminance (lux) when an objective lighting quantity is required. Perceived brightness depends on the observer, adaptation level, contrast, viewing angle, illuminated surface, light distribution, and surrounding conditions. A lamp with more...

Beam Spread

Beam spread describes the width of a beam, either as an angle or as the illuminated width at a stated distance. It is one characteristic of a light pattern and may be specified using beam angle and field angle. The illuminated width increases with distance, so a quoted width is meaningful only when the measurement distance is also given. Beam spread does not show how...

Beam Pattern

Beam pattern is another term for light pattern. It describes the shape and distribution of light produced by a lamp, including options such as Flood, Wide Flood, High Beam, Reverse, Glare-Free, Super Wide, and Pencil Beam where available. Each pattern is designed for a different combination of width, reach, uniformity, cut-off, and mounting position. A narrow pattern may support forward visibility at longer range, while...

Beam Intensity

Beam intensity is commonly used to mean luminous intensity within a light beam. The preferred technical term is luminous intensity, measured in candela (cd), which describes how much light is emitted in a particular direction. A higher candela value generally indicates more long-range reach in the measured direction, but it does not describe total light output or the width and uniformity of the light pattern....

Beam Angle

Beam angle is the angle between the two directions where luminous intensity falls to 50% of the maximum intensity at the center of the beam. A smaller beam angle concentrates light; a larger angle covers a wider area. Nordic Lights distinguishes beam angle from field angle, which is measured at 10% of maximum intensity. Because manufacturers may publish different angles or use different test conventions,...

Backhoe Loader

A backhoe loader is a wheeled machine that combines a front loader bucket with a rear-mounted backhoe. It can load, carry, excavate, and trench, making it useful for construction, road maintenance, utilities, and agriculture. The combination reduces the need to move several separate machines between small or varied jobs. Many models also accept attachments such as breakers, augers, compactors, and grapples. Because the operator may...

Articulated Truck

An articulated truck is a heavy-duty vehicle with two chassis sections connected by an articulated joint. The joint allows the sections to pivot relative to each other, improving maneuverability on rough terrain. Articulated dump trucks are widely used in mining, construction, and quarrying. The articulation joint provides steering while the driven wheels maintain contact and traction on uneven ground. This makes the vehicle suitable for...

Anti-Glare Coating

An anti-glare coating is a surface treatment that reduces reflections from a lens or display. It is not the same as Nordic Lights’ Glare-Free optics, which control the light pattern with a defined cut-off line to keep stray light away from eye level. Such coatings can improve visual comfort when unwanted surface reflections would otherwise obscure what the operator needs to see. Their effect depends...

Amperage

Amperage is an informal term for electric current: the rate at which electric charge flows through a circuit. It is measured in amperes (A). For a work light, the current drawn depends on the supply voltage and operating mode; see Nominal Current. Current draw is important when selecting cables, connectors, fuses, switches, relays, and power supplies. These components must be rated for the expected load...

Adaptive Lighting

Adaptive lighting, also called intelligent or smart lighting, automatically changes light intensity or other lighting behavior in response to sensor data, operating conditions, or vehicle movement. Nordic Lights describes smart lighting as lighting that adapts without user input or gathers and transmits data through integrated sensors. In heavy-duty vehicles, the control logic can use inputs such as ambient-light level, vehicle speed, steering angle, attachment position,...

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