RE: Led lights

["Jon Whiten" <jon@xxxxxxx>]

I believe that the White LED is a blue chip behind a phosphor coating (like
a Fluorescent tube) and it is the glowing phosphors that give the white
light.

We use a few hundred thousand 5mm LEDs here at work (Red, Amber, Green and
White but mainly red though).  If anybody is particularly interested I
could
try and sort some Specs and Prices.


Regards

Jon Whiten
http://www.whiten.co.uk
-----Original Message-----
From: Kilgore, Andrew [mailto:amkilgore@xxxxxxx]
Sent: Friday, February 06, 2004 5:08 PM
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Led lights

What the hell - I'll have a guess at this one.
(Please try to hold back your laughter until the end ;o))

>From my school days, I think I remember something about light
wavelengths.
As I recall, one end of the visible spectrum has a wavelength of ~400nm
(blue?) and the other end has a wavelength of ~700nm (red?).
I think the problem with "white light" is that it doesn't have a
set
wavelength because its a mixture of all the colours from 400nm to 700nm.
So,
white light is made up of all colours - remember at school shinning white
light through a prism and it "separating" all the colours...?

OK, that's my best guess - anyone any other ideas...?

Thanks,
Andy.



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