Originally Posted by
smasha
don't worry about the date... it's still a physical fact that 1W of electrical energy at 100% efficiency can produce, at most, 683 lm.
generally, as power and heat increases, LED efficiency decreases. that's why the 10W LEDs will be less efficient than 2-3W LEDs.
I was trying to pull your leg a bit. AFAIK we still haven't reached the theoretical limit for LED output which is quoted in that article as being only 260 to 300 lumens per watt, which is quite a bit less than the numbers you posted. So if you know where I can get any of those super emitters you've referred to - I'm in!
