Re: Solux Bulb color temperature
Re: Solux Bulb color temperature
- Subject: Re: Solux Bulb color temperature
- From: "Fleisher, Ken" <email@hidden>
- Date: Tue, 17 Feb 2009 10:50:05 -0500
- Thread-topic: Solux Bulb color temperature
On 2/17/09 10:31 AM, "Beisch Clemens" <email@hidden> wrote:
> But which one is closer to D50?
>
> Am 17.02.2009 um 16:25 schrieb Fleisher, Ken:
>
>> But one is closer to 5000K
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.
Thank you.
--
Ken Fleisher
Photographer
Imaging & Visual Services
National Gallery of Art
Washington, D.C.
Phone: (202) 712-7471
email@hidden
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