@ Loonie: It's all about the heat. You put that much in a small package, and you melt the LED drivers. Take a look at the CREE/LLF fixture insert, and you'll see what they had to do to get 12 watts/650 lumens of LED into a 6" round capsule (It is a cool product, though).
Heat is LED's enemy. Until they solve that, you won't see very bright LED systems in small packages.
Also - Keep in mind that as LEDs age, they shift color and get dimmer. That will become an issue for many applications.
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@ Loonie: It's all about the heat. You put that much in a small package, and you melt the LED drivers. Take a look at the CREE/LLF fixture insert, and you'll see what they had to do to get 12 watts/650 lumens of LED into a 6" round capsule (It is a cool product, though).
Heat is LED's enemy. Until they solve that, you won't see very bright LED systems in small packages.
Also - Keep in mind that as LEDs age, they shift color and get dimmer. That will become an issue for many applications.