RE: Led lights

["Kilgore, Andrew" <amkilgore@xxxxxxx>]

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

>from
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.

-----Original Message-----
From: Mark Hallows [mailto:markhallows@xxxxxxx]
Sent: 06 February 2004 14:49
To: 'ukha_d@xxxxxxx'
Subject: RE: [ukha_d] Led lights


Cool Ian

Thanks for that.. i will now go and buy some... Just get a bit fed up with
getting ripped off normally.. If I had an IQ above double figures I would
ask you why white LED's are so hard to produce.. As it is I may not
understand the answer and may feel even less smart than I do already..

Thanks

Mark H...

-----Original Message-----
From: Ian Lowe [mailto:ian@xxxxxxx]
Sent: 06 February 2004 14:47
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Led lights


Very bright Orange and Red leds are (and have always been) dramatically
easier to produce and therefore cheaper:

When I worked in Craplins, Blue Leds had just appeared and white was a
"wouldn't it be nice".. the blue leds were nearly a tenner each
whilst
the reds were oh... about 10p each!

White Leds, especially the ultra-bright ones are a big money item to
manufacture: it's going to be some time before we see them at similar
prices to the reds and oranges are just now.

I.

-----Original Message-----
From: Mark Hallows [mailto:markhallows@xxxxxxx]
Sent: 06 February 2004 14:37
To: 'ukha_d@xxxxxxx'
Subject: RE: [ukha_d] Led lights


I just went to the TLC website and was unpleasantly surprised to find
that
white LED GU10's are nearly double the price of the Orange and Reds...
Is
there any reason for this other than to (as bloody always) rip off the
consumer ?

Mark H.



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