LED Guide

Solite designs, manufacturers and tests the vast majority of its own LED electronic systems including the lenses for precise optical control. We carefully consider end of life scenarios, for example, LED failures, solder joint failures and isolated component failures to ensure new designs have on-going system reliability even when individual components fail.

As part of the F.W. Thorpe group our 80 year company history, running into thousands of years of combined experience, ensuring every aspect of lighting a space is carefully considered - a requirement all the more important as LED lifetimes are now expected to reach 50,000 to 100,000 hours or even more!

Thorlux SMT Room

LEDs have developed significantly now exceeding the performance of even the best fluorescent solutions. Volume increases have reduced costs, making them the ideal choice in many more applications. Not all LED solutions are the same so Solite has introduced a simple marking code into its literature to identify the key performance characteristics of its LED based luminaires - an example is shown below.

Example LED characteristics table
LED characteristics are shown on the web catalogue download pages and show the best performance expected within the range. Please check photometric data for specific model types which may be less than the optimum figure tabulated.
CRI Indicates colour rendering index (colour quality). A minimum of 80 CRI is recommended for working areas.
Colour Temperature The approximate colour temperature of the light source. There is a tolerance for a specific chosen colour temperature. More accurate information, for specialist applications, is available upon request.
Rated Life (Hours) These figures illustrate the target life expectancy of the LED (for example 60K = 60,000 hour life expectancy) which is a combination of light output degradation (L70 = when the light output has reduced to 70% of its initial level, L80 = 80%) and lamp performance expectation (B10 = when 10% of the LEDs have failed to meet operational expectations).
Protection Some LED “lamps” comprise a number of LEDs connected in series or in a series/parallel group. If the system is protected (P) then failure of a single LED will not affect others in the group. If the system is unprotected (U) failure of one LED will cause others in the group to extinguish.
Driver Efficiency This figure illustrates the LED driver efficiency.
Replaceable When the LED fails, some luminaires require replacement in their entirety (Rx) some have replaceable LED “lamp” assemblies (R).
Power Factor Indicates LED driver power factor.
LL/CW Luminaire lumens per circuit watt, the luminaire efficiency including ALL optical and gear losses. It is very important to compare this figure correctly - other manufacturers may state LED efficiency, for example, which does not include all losses within the system and could therefore be a misleading, much higher figure.

This figure is always the “best in class” for the luminaire range, if a rating for a specific luminaire is required please refer to the photometric data or contact the Thorlux Technical department.

This website presents the very latest Solite LED product innovations using three different types of LED technology:

  1. White high power LEDs - Ideal where excellent optical control is required.
  2. Blue LEDs and remote phosphor - Ideal for excellent efficiency where precise optical control is less important.
  3. Medium power LEDs - Ideal to create high efficiency, well diffused, low glare solutions.


LUX GUARD by Thorlux, is a patented current sharing PCB and circuit design philosophy. If an LED fails then its current is shared via neighbouring circuits, with each LED’s brightness increasing slightly to compensate. LUX GUARD ensures that a luminaire continues to provide its designed lumen performance, even in the case of nuisance LED failures, and reduces the maintenance costs of a project.