Knowledge Hub
LED LIFETIME
All LEDs used in Dextra Luminaires are tested in accordance with the LM80-08 standard and LED lifetimes are predicted using the TM-21 standard. TM-21 only permits meaningful prediction of lifetime to six times the test period undertaken in LM80 testing of the LED. Dextra Group has LM80 data to 10,000 operating hours therefore allowing LED lifetime to be predicted to 60,000 operating hours.
THERMOPLASTIC DIFFUSER GUIDANCE
Dextra group recessed luminaires which are subject to thermoplastic regulations are manufactured with TP(a) diffusers to ensure they offer optimum safety in the event of a fire and to allow installation in a range of installations and configurations without the restrictions applied to TP(b) rated diffusers as per The Building Regulations 2010 Fire Safety Approved Document B, Volume 2: Buildings other than Dwelling Houses.
CENTRAL BATTERY SYSTEMS
Emergency lighting is most commonly provided in the UK with integral emergency control gear, this provides a robust and reliable system given each emergency luminaire operates independently during power failure, however can be costly to test and maintain as each emergency luminaire contains its own battery.
COMMON COMMERCIAL DIMMING SYSTEMS
There are a wide range of dimming systems available for commercial lighting systems offering differing benefits, here we explore the most commonly used systems, the purpose they fulfil and potential pit falls to be aware of.
COLOUR CONSISTENCY AND MACADAM ELLIPSE
Due to the method by which LEDs are manufactured variations occur within batches of chips. Significant progress has been made in this area over the last few years and production variations within batches of LEDs are generally smaller, however such variations are an inevitable part of LED manufacturing which will likely never be completely eliminated.
BENEFITS OF LITHIUM
When considering the ongoing costs of operating your lighting installation the maintenance costs for emergency luminaires can form a significant proportion, second only to power consumption.
Aside from the need to undertake function testing on a monthly basis and duration tests annually whilst maintaining accurate test records off site, the limited life time of Nickel Cadmium and Nickel Metal Hydride batteries means that regular battery replacement is required.
LED DUE DILIGENCE
With hundreds of lighting suppliers offering LED products from around the world how can you be sure you are purchasing a product that will give you the quality of light, durable long term performance and the energy reduction that you require to justify the investment?
EMERGENCY EXIT SIGNAGE
At Dextra Group we offer a comprehensive range of emergency lighting products. Whilst we’ve built a range to cover all scenarios, there is often a need for guidance when attempting to select the correct signage for a given application.
COLOUR TEMPERATURE, COLOUR RENDERING AND R VALUES
Colour temperature and rendering are key considerations when specifying your lighting installation and substantially effect both the look and feel of an area and the accuracy with which colours can be identified.
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