"Sylvia Else"
Arfa Daily wrote:


I was given to understand that the colour of an incandescent bulb is
what humans are comfortable with, because it closely matches the colour
and spectrum of our sun.

The sun's effective temperature (the blackbody temperature that gives
approximately the same spectrum) is about 5800K, which is a lot higher
than the colour temperature of an incandescent.

** Daylight has no particular colour temp.

It varies from 11,000K on a overcasts day to less than 2000K at dawn and
dusk.

However, daylight ( like incandescent light ) has a smooth spectrum and the
human eye adjusts to the varying colour temps almost perfectly.


The light from an incandescent is deficient in the blue end of the
spectrum, which makes blue-coloured objects look darker than they should.

** ********.


.... Phil