Re: Thoughts on Very high intensity blue leds.

[Richard Malcolm-Smith <rich@xxxxxxxxxx>]

Paul Gale wrote:
> Well, that's going to be down to the colour temperature of the
'white'. Provided you have all the right wavelengths and the resultant
desired colour temperature, I'd have thought it would be OK.

Nope, LEDs are very monochromatic, if you mix red green and blue, you get
red
green and blue, it looks white, but anything orange or yellow or purlple
will be
very dull under them because the dominint wavelengths they reflect are not
in
the light, and anything thats red green or blue will pop right out and look
really bright, but the shade of red or whatever will be closer to that of
the
LED then the material being lit up.

White LEDs have the same issue, only there its blue and yellow that are
predominent, but the yellow is so wide that it doesnt make it that bad.

good colour rendering comes from a flat graph of the wavelenghts present,
something that LED lighting doesnt have (yet)



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