The full range of Codex LED products are accompanied by detailed technical and performance information which can be can be downloaded as datasheets from the product pages of this website.
Efficiency is at the heart of our product range and this is demonstrated time again by the lumen to watt ratio delivered by the Codex LED range of products. Understanding the technical information is an important part of the specification process. Here are some of the more common terms used within LED lighting and a brief explanation.


How efficiently a light source converts electricity into light is described by efficacy, specifically by confirming the number of lumens per Watt. The higher the efficacy value the more efficient the light source uses electricity.

lamp efficacy lm/W using lamp lumens, or luminaire efficacy – All Codex products operate in excess of 100 lumen per watt providing outstanding light output at exceptionally efficient levels of power consumption

CCT – Colour Temperature LED may either be coloured, typically

White lighting can vary from a warm white with a higher red content to a cool white with a higher blue content. This is described by the colour temperature where warm white has a lower value (in Kelvin) than cool white.

Typically warm white could be considered as 3000K or less, cool white as 5000K or above, and intermediate as between 3000K and


Ra – Colour Rendering Every light source is characterised

The performance of the product is also rated according to how well it shows colours. This is described by the Ra number where the higher the number the more accurately colours are shown. For the majority of indoor workplaces a minimum of Ra80 is required. For general outdoor lighting Ra70 is more usual. Increasing the Ra number to 90 or above generally comes at the expense of a reduction in efficiency

LED Driver (LED Control Gear)

The reliability of a LED luminaire is also dependant upon the driver. If this fails the luminaire will also fail. Therefore it is important to make sure the driver has a suitable rated life or is easily replaceable.


All Codex LED products carry an extended 3 or 4 year warranty. All our products are carefully checked, tested and are subject to strict controls throughout the manufacturing process.

Within the warranty period Codex LED will repair, replace, rectify or take back products, which Codex LED deem to be defective as a result of a material or manufacturing fault. Any warranty claims should in the first instance be made in writing to

Full details of the warranty terms and conditions are available via the Codex LED warranty terms and conditions which can be downloaded by following this link

Codex LED Warranty Information