LEDs waste 75% as heat

[slebans]

PS: Stephen, I'll do that Excel next week most probably. As soon as I have it completed, Ill send you it. Im thinking on improving it adding the color matching and color coordinates function, so the spreadsheet calculates x,y,z coordinates, u' and v', CCT, CRI and maybe some other color indexes.

That would be perfect, Kinnza. I worked through the math last night to convert the color coords to CCT but then got stuck trying to convert to (u,v) and onto to CRI. A couple of hours of math and color theory - my head started to ache!

Stephen Lebans