Re: Solux Bulb color temperature
Re: Solux Bulb color temperature
- Subject: Re: Solux Bulb color temperature
- From: Graeme Gill <email@hidden>
- Date: Wed, 18 Feb 2009 13:31:42 +1100
Andrew Rodney wrote:
On Feb 17, 2009, at 6:34 PM, Graeme Gill wrote:
On the contrary, it seems highly likely to me that the OP was referring
to a black body or daylight radiator as a specific target.
Really? Here's what I got:
Hello. This is a question about the color temperature of Solux bulbs
which we plan to use for proofing lights. There are two bulbs rated at
4700K and 5000K.We purchased the 5000K bulbs expecting the color
temperature to be fairly close to this, but when we measured it we see
it is 4450K.
Given you just wrote:
There is a difference between 5000K black body or 5000K daylight,
and 5000K CCT (Correlated Color Temperature).
Do you think the color temp of Solux bulbs in this context is producing
either daylight or a Black Body?
I think the OP was interested in how closely the different Solux
bulbs approach the D50 or 5000K black body white point, but used the
typical sloppy evaluation of this by quoting just the CCT.
There are two reasons for reading it this way: 1) "5000K" on
it's own is a temperature, not a CCT line. Heat things like a
tungsten filament to 5000K, and it emits something that resembles a
black body spectrum. 2) It's what's useful in a color context.
It's one thing to evaluate the illuminant in a sloppy way that
omits one dimension, it's another to assume that it is useful
to have a line as a white "target".
cheers,
Graeme Gill.
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