Sorry I was away for a bit. Anyway, take a peek at one of the major LED manufactures:
http://www.lumileds.com/cust_lighting/index.html http://www.lumileds.com/news/lumen.html
Now this is done with white LEDS,you can gang a bunch together and make a light engine!
I wonder what would happen if you got red,green,& blue ones together? Hmmmm. LEDS are great, but the future of our hobby lies with lasers.
You will know the future is here when someone annouces the they can provide green lasers @ 1watt output for commercial sale. The problem is not with blue or red lasers at 1 watt output, but green ones. They apply InAlGaN on a substrate to achieve light output. The problem is you can't get the epitaxy layer uniform on the sustrate (Indium, Aluminum, Gallium, Nitride). When this happens watch out!! Any projection equiptment you have is obsolete. A president of of well known company said you could have projector the size of a slim laptop, it would not require fans and would project a HDTV picture 30 meters wide! I almost fell over when he told me that. Anyway sorry for getting off point.
The answer is LEDS!
http://www.avsforum.com/ubb/biggrin.gif
Later, I have got to go watch some college football!
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Laser Projection Is Coming!