jim rozen wrote:
In article , Richard J Kinch
says...

Phosphor? In an LED?

Yes. The white LEDs that radio shack
sells are really blue led's that excite
a bit of yellowish phosphor on top
of the diode. They have the same
turnon voltage as the blue ones, and
a close inspection of the light
shows that the lens focusses the
blue and yellow light at a slightly
different spot.

Red too.
The better ones give a pure white spot with no trace of colour variation,
and not too bad red output.

--
http://inquisitor.i.am/ | | Ian Stirling.
---------------------------+-------------------------+--------------------------
Get off a shot FAST, this upsets him long enough to let you make your
second shot perfect. -- Robert A Heinlein.