How much energy is actually saved with LED emergency lights?

[Guest PaulNyler]

Hi

i am a bit confused about the energy consumption of some of the LED emergency lights. If they consume between 5 and 8 watts (see example of LED emergency light -see datatsheet in technical tab), why not just use ordinary emergency lights with standard fluorescent tubes (8-20 Watts)? They cost a fraction of the LED lights.

Paul

[Safelincs]

Hi

The power consumption of the actual LED is in the case above about 3.5 watts whilst the rest of the power goes into recharging the battery and the circuit. This part of the consumption would be identical to fluorescent tube emergency lights. Fluorescent tubes are of course already quite economic, so the energy saving of LED versus fluorescent tubes is only in the range of 2-10 watts. However, the real saving from LED emergency lights comes from not having to replace the tubes on a half yearly or yearly basis. The LEDs will last a lot longer, hence saving costs for maintenance call-outs and replacement tubes. The actual energy saving depends also from whether an emergency light is maintained or non-maintained.

A particular cost efficient combination is self-testing LED emergency lighting which minimises any maintenance costs and inspection effort to a minimum.

Harry