Use discharge lighting for floodlights

Capital cost is £5 - £30 for bulbs and typically £60+ per fitting. The energy saving available is up to 80 or 90% if the most efficient discharge lights are chosen.



Floodlights are expensive to run, especially when they are left on for long periods. Discharge lighting is not suitable for motion activated lighting (as the bulbs take a while to warm up), but when security lighting is left on for long periods, such as in a carpark,

the replacement of tungsten halogen floodlights with discharge lighting gives impressive savings. The most energy efficient discharge lighting tends to be high-pressure sodium, although it is worth comparing the efficacy of bulbs (the light output in lumens per watt of power consumed) before purchasing.