Dave Fawthrop wrote:
On Tue, 21 Mar 2006 07:49:22 GMT, "." wrote:

Dave Fawthrop wrote:
On Mon, 20 Mar 2006 19:35:26 GMT, "." wrote:

Dave Fawthrop wrote:
On Mon, 20 Mar 2006 18:31:18 GMT, "." wrote:

Dave Fawthrop wrote:

White LEDs are very *white*

Which is what *I* see.

IME they are very /blue/

snip

What you are seeing is the *difference* between the light sources.

what I'm seeing is different wavelengths given out by those
lightsources

very blue, very cold.

Colour is a very personal thing

it's totally impersonal, measured in Kelvin's.

Kelvins are a *temperature* scale.
http://www.windows.ucar.edu/earth/At...re/kelvin.html

oh, dear, poor dave :-(

http://en.wikipedia.org/wiki/Color_temperature

Colour temperature is totally inappropriate for measuring the
wavelengths light from LEDs. What colour temperature is a green LED?

I don't care ! but here's some reading matter for /you/ ;-)

http://www.helios32.com/LEDOctMODELING21-23_Reprint.pdf

http://snipurl.com/nwme

hth