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To: mauser96 who wrote (1772)	2/3/2000 10:46:00 PM
From: mtnlady	Read Replies (2) \| Respond to of 10713

Blue LED light is even more important from a laser standpoint. From what I've read blue light is the holy grail of the laser folks. It has a shorter, denser beam that can read much more information than of the other wavelengths colors. Some folks in the article where saying that it is relatively easy to go from a blue LED to a blue laser. The article was posted on this thread recently - perhaps even today? So in short... blue LED light is important for several reasons.. 1) You can get more money per LED for it (someone posted a price sheet for LED's awhile back). About 3-4x the price of other LED colors if memory serves me correctly 2) The color can be used to create other colors and 3) The article stated that the most important reason why blue LED's are coveted(it only mentioned item #2 & #3) is that it is a key stepping stone to creating a blue laser (although the article mentioned this point is contended).

To: mauser96 who wrote (1772)	2/4/2000 2:35:00 AM
From: FLSTF97	Read Replies (1) \| Respond to of 10713

Thus a blue LED should be more efficient at stimulating phosphors to produce white light than would be a red or other color LED. Lucius your message is more or less correct but the statement above is not. You need to stimulate phosphors with higher energy radiation to have them emit the lower energy light. Blue is critical because it is at the high energy end of the visible light spectrum. If you have only blue light, you can then have various phosphors emit the other colors needed to produce white light (the combination of all visible colors but approximated by adding the primary colors). If you only have red light you will never be able to get white light from a phosphor. It is not an efficiency issue. I hope that helps clarify the importance of blue leds in achieving white light. FATBOY