LED check list

This is a check-list of relevant features of Glamox and Luxo LED luminaires. The information it contains is of a general nature and may not necessarily apply to all Glamox or Luxo LED luminaires. In case of specific questions, please consult our customer service.
Subject Explanation

Lifetime LED luminaires (L70) For all luminaires, we list:
• The median useful life (IEC 62717) LxB50 at Ta 25 degrees. Lx may vary from 70 to 90 depending on the product and the corresponding lifetime goes up to 100.000 hours. 
• Lamp lumen maintenance factor (LLMF) 50000 h, B50, Ta 25 deg. This is a factor from 0 to 1,0.
For industrial luminaires, we also list:
• The median useful life (IEC 62717) LxB50 at maximum Ta. Lx may vary from 70 to 90 depending on the product and the corresponding lifetime goes up to 100.000 hours.

A selection of our luminaires may yield L70 50.000 hours at 55 degrees. Read more about LED lumen degradation in the LED section on our web site.

Lifetime LED driver/converter LED driver lifetime in Glamox and Luxo luminaires are at least 50.000 hours at maximum rated Ta. As a minimum, the Ta is 25 degrees. Normally a failure rate of maximum 10% applies. Special drivers have a lifetime of up to 100.000 hours at the listed maximum temperature.

LED lifetime documentation LED module and driver lifetimes are documented by measuring the components' Tc point temperature, (the Tc point is a specific point on the component) and compare it to the components' maximum rated temperature. Temperature measurements are performed at Glamox' laboratories and carried out at an ambient temperature of 25 degrees. Heat measurement reports and lifetime calculations are available on demand.

What is the Ta for Glamox fixtures? Glamox and Luxo luminaires are tested and approved for an ambient temperature (Ta) of 25 degrees, unless otherwise noted. A selection of our luminaires are approved for Ta 55 degrees.

What if one diode in the LED-module stops working? A standard safety design on most Glamox and Luxo LED modules is that any single LED failure on LED modules containing more than one LED will result in a short circuit rather than an open circuit. The short circuit will secure that the current is conducted through the module and that the other LEDs continue to work.

What is the lumen output
of the LED luminaire?
Glamox Luxo provides actual lumen output or "lumen out" of all our LED luminaires in the datasheet and on our web site. We advise our customers to carefully note the difference between the light output of the LED module itself and that of the complete luminaire.

What is the variation in flux across modules/fixtures
(within the same LED generation)?

The variance in lumen output on Glamox and Luxo luminaires is +/- 10%. This means that the light flux from a luminaire is stable, but may vary across many luminaires.
What is the colour
The colour temperature of Glamox and Luxo luminaires is listed in the datasheet/web page.

What is the colour
The colour tolerance of Glamox and Luxo luminaires is expressed by a number of MacAdam steps. The more steps, the higher tolerance. An explanation may be found in the LED section of our web site. Most of our luminaires have an initial tolerance of 3 MacAdam steps. This equals +/- 100 K at 3000 kelvin, but this kelvin tolerance increases with higher colour temperature. Other tolerances up to 5 MacAdam steps may occur and is properly marked in the product documentation.

What is the colour stability
over the lifetime?
A small shift in colour over time may be experienced because of changes inside the LED itself. This shift is in most cases not visible, but may in some cases lead to a higher MacAdam tolerance, e.g. from 3 to 4 steps.

What is the Ra? The Ra of most Glamox and Luxo luminaires is 80. For certain products the Ra may be of other values, and they are always properly marked.

Does the Ra change over
the lifetime of the fixture?
The Ra for Glamox and Luxo luminaires is normally listed as a minimum value, i.e. that the Ra value will never drop below the stated Ra over the lifetime of the luminaire.

What is the chemical compatibility (corrosion resistance) of
the LED module?
Certain types of LED packages are inclined to degradation from chemical substances such as fluorides, sulphur oxide and others. In case of presence of such gases, special care needs to be taken when selecting LED types. Please consult our customer service for more information relevant to your project.

What is the technology
used for dimming?
There are basically two ways to dim LEDs. 1. linear current reduction where the output current magnitude, and hence the light level, is reduced (also called amplitude modulation).2. PWM (Pulse Width Modulation) where the output current is reduced by chopping the output current. PWM dimming or a mix of amplitude and PWM is preferred by the major LED driver manufacturers. Most Glamox and Luxo luminaires have a driver output frequency of minimum 400 Hz, to avoid flicker.

Are light technical data

Yes, via our web site.
Does documentation for photobiological hazard
(e.g. eye damage) exist?
Yes, all Glamox and Luxo LED fixtures comply with EN 62471 - Photobiological safety of lamps and lamp systems. The ENEC and CE marks on our products confirms this compliance.

Is the LED module
Yes, by qualified personnel only. LED module replacement is only recommended for positive cost-benefit analyses, since there may be other issues with different light output and loss of driver compatibility with the new module. A selection of our luminaires have completely integrated LED modules.

If the module is replaceable,
is it future proof, i.e. forward compatible?
Yes. Zhaga-approved modules have a layout and mounting method that allow them to be replaced with similar modules in the future. Most Glamox and Luxo downlights and linear luminaires have Zhaga compliant modules. Modular luminaires will follow.