2 Apr 2009

Lumens per watt: a useful graph

Was looking into the background of lighting efficiency when I came across this chart on the web. Useful. BTW, Part L defines energy efficient lighting as anything that equals or betters 40 lumens per watt. Click on the chart to make it open up larger in another window.

1 comment:

  1. It's a bit out of date on the LED figure. (Although possibly representative of products available on the high street...?)

    Cree have broken through the top of that graph in the lab:


    Prices should be coming down as well, with breakthroughs being made in fabrication costs:


    I would be interested to know if anyone has experimented with high efficiency, low cost, but low output solutions. eg. some sort of light emitting wallpaper :-)

    A softer, more diffuse light source might actually be more pleasant in use...