LED - NORDIC LIGHTS® - Herrmans Oy Ab

FAQ | LED

No. The lamps are designed to take the brand bridge into account. The LED’s are positioned higher & lower than the bridge &, combined with the light guides & lens designs, ensure that the usable light is directed where needed so that the resulting light pattern is exactly as intended.

Yes. Various combinations of LED lamp lumen output & light pattern are available. The correct replacement LED lamp to choose will depend on the application.

It should be remembered that LED typically has a higher colour temperature than HID. The lamps are more efficient & light is much more directional, resulting in less stray (wasted) light & illumination more accurately directed to the area where it is really required.

Yes. The Spica & KL ranges have isolated electronics. Also the Scorpius N4410 has electronics that are isolated from the lamp casing.

Yes. As long as the lamp in question has more than one LED chip. The light output will of course be reduced.

Energy efficient low power consumption (- 85% compared to other light sources).

Compact & directional providing design flexibility & no wasted light.

Unaffected by switching cycles.

Natural colour temperature (“Daylight”) which is easier on the eyes & results in better, more productive working conditions.

Very long lifetime compared to other light sources (50,000+ hours).

Maintenance free. No bulb replacement results in less machine down time & lower maintenance costs.

Rugged. No vulnerable filament. Lamps can take extreme abuse.

Starts instantly (Nanoseconds versus minutes – HID).

Environmentally sound. No hazardous substances (lead/mercury).

RoHS complaint.

Very wide operational temperature range.

An LED is not a standardized light source like a halogen or HID bulb. LED’s vary, particularly in physical size & lumen output. This enables flexibility to produce lamp designs suitable for a wide variety of applications & customer requirements. A lamp with lower lumen output typically requires less, or lower powered LED’s than a lamp with a much higher output. The lamps physical dimensions, shape & lumen output can be tailored for various situations. Using combinations of lenses & LED’s can also create products with identical appearance but with different light patterns & output.

Lamps using switched power supplies actually turn the LED’s on and off extremely rapidly (<300Hz). However, the human eye cannot see this (the eye can only see flicker below about 200Hz).

If LED flickering is noticeable then there could be various reasons:

Cheap LED lamps may be designed with too low LED switching frequency.

There may be a fault in the lamp circuitry.

There may be an intermittent connection of a component on the circuit board.

There may be an intermittent supply connection to the lamp (e.g. loose, or poorly plugged in connector).

The flicker may be “Fake”. e.g. The light may actually be reflecting from a vibrating shiny surface. So, the light itself isn’t flickering, but because the shiny surface is moving rapidly, the reflected light is also changing direction rapidly.

A Lumen is the unit of measurement of the complete quantity of light emitted by a light source – the luminous flux.

Lux is the quantity of luminous flux on a surface. It decreases by the square of the distance (inverse square law) of the surface from the light source:

E(lx) = luminous flux (lm) / area (m2).

What is the difference between a Lumen and a Candela?

Lumen = Luminous flux = The complete quantity of light emitted by a source.

Candela = Luminous Intensity = Quantity of light radiated in a particular direction.