Can LED lighting save me 50% off my lighting bill?
Yes – in most cases 40-60% savings are achieved. Firstly, the energy efficiency of LED’s has been gradually increasing year on year. Now, bare LED’s are achieving 150 to 200 lumens per watt (l/w) which is over twice that of many compact fluorescent lamps, nearly double that of the best linear fluorescent lamps and better than High Intensity Discharge Lamps.
Efficiency generating light (known as “Efficacy”) is only half the story. Ensuring the control gear (Driver) has minimal power consumption (losses) and that the light fitting (Luminaire) makes the best use of this light and sends a high proportion in the direction desired (Task Area) is just as important - a major advantage of LED’s is that the light is generated from one side of a chip or circuit board therefore dispersing light in one direction, rather than all around.
Combining these two means that a practical solution may improve lamp and luminaire performance over many depreciating, dirty and often inefficient luminaires. A straightforward measure to look for is “Luminaire lumens per watt” (Ll/w).
As an example, your existing downlights may only have given 40Ll/w when new, modern LED Downlights usually exceed 100 Ll/w – rather than produce more light, we reduce the power to give a similar light level, resulting in you saving 60% of your energy.