Re: Solux Bulb color temperature
Re: Solux Bulb color temperature
- Subject: Re: Solux Bulb color temperature
- From: Beisch Clemens <email@hidden>
- Date: Tue, 17 Feb 2009 17:40:02 +0100
I'm not refering to the paper of D. Pascale and R. Breton, becuase I
didn't knew that it exists ;-)
The only thing I wanted to clarify is, that Kelvin is the wrong
method for this kind of work.
Let's do it practicaly:
1. Take your spectro with an ambient head.
2. Measure the the bulb
3. Load the measurement in Excel, Openffice Calc or what ever
4. Scale the measurements and compare it to you reference spectrum
Than you will see which one works better for you.
Btw.: I don't know which bulb is better and don not say that one is
better than the other.
A few years ago a had a customer who had trouble with his viewing box.
After cleaning the box inside and outside everything was fine.
Just because you like Kelvin, after cleaning the box the measurements
gave about 500K more ;-)
Regards,
Clemens Beisch
Am 17.02.2009 um 16:50 schrieb Fleisher, Ken:
The 5000K bulb is closer to D50 as far as I understand it and as
shown by
the improved CRI and MI (although it is only "slightly" better, it's
certainly not worse). If you are using D. Pascale and R. Breton's
paper as a
guide, keep in mind that the comparison on page 25 compares the
5000K bulb
with the 4700K bulb (with over-driven DC current to obtain closer
to 5000K).
I still don't see any reason why the 4700K bulb used at normal wattage
(assuming you would not want to over-drive it due to greatly
decreasing bulb
life) would be preferred over the 5000K bulb.
Also, when talking about using this for a soft-proofing application, a
difference of 500K between proof light and monitor white point can
make a
big difference for critical color matching, so I don't see this as
insignificant. (500K because our 4700K bulbs actually measured at
4450K.)
If I am missing something, please be specific.
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