From Don's LED FAQ pages. Sounds interesting, but as with any new cutting edge technology, the cost is probably very high. It was a year ago that was posted, perhaps in the near future they will become available. It took awhile for the Luxeon Stars to become available to the hoi polloi.
"UPDATE 3/13/2004 - zinc selenide white LEDs have a typical voltage drop of 2.65 volts at 20 mA. They can be made in aqua-blue. White ones have chips that emit aqua-blue light out their tops and orangish light out their sides, and the light has to be mixed inside the LED. Roithner Laser is selling a few zinc selenide models. Craig Johnson has an online review of these in his Page on LEDs available from Roithner Laser."
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