Re: Regarding 6500K light source
Re: Regarding 6500K light source
- Subject: Re: Regarding 6500K light source
- From: Chris Murphy <email@hidden>
- Date: Fri, 1 Feb 2002 23:22:07 -0700
email@hidden (Bruce Fraser) writes:
>
You could filter sunlight to D50, because the sun emits a fairly
>
continuous spectrum, but manmade light sources don't -- they emit
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spiky wavelengths, so there isn't much to filter.
>
>
The best we can do is to make light sources that produce tristimulus
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values equal to those of the D50 reference illuminant, or more
>
strictly to a correlated color temperature of 5000K.
SoLux makes a 4700K tungsten based bulb that has a spectral power
distribution very much like D50. They have some way of getting close to
D65, but the problem with D65 is there is quite a bit more UV output, and
in order to get UV output you need some kind of fluorescent light. When
you add fluorescent light, then you get a spikey SPD.
Chris Murphy
Color Remedies (tm)
Boulder, CO
303-415-9932