Re: Proofing light recommended CRI ?
Re: Proofing light recommended CRI ?
- Subject: Re: Proofing light recommended CRI ?
- From: "jc castronovo" <email@hidden>
- Date: Mon, 10 May 2004 08:59:15 -0400
I measured the Solux lamps we use here with a spectro, and they fared quite
well against daylight - the best I've seen in fact. The smoothness and shape
of the curve was impressive. The color temperature wasn't quite as high as
daylight, but that's not as important. My major complaints with Solux are
that the sweet spot of the light is rather narrow and there's severe color
fringing at the edges of the beam. For these reasons we don't use them for
proofing - just to illuminate our retouching room. For color matching, we
still use our dimmable D50 GTI box because it's more of a standard and it's
even.
john c.
----- Original Message -----
From: "Roger Breton" <email@hidden>
Subject: Re: Proofing light recommended CRI ?
>
>
I suspect there's more than full spectrum involved. I have rigged Solux
>
lamps left and right and they have full spectrum. Although they say they
>
have a CRI of almost 100, I'm still not convinced to go large scale with
>
them in my own and my client's proofing environments. Short of having a
>
spectroradiometer to physically measure the spectral power distribution
>
curve of all these lamp, I find CIE chromaticities to be the best
substitute
>
for making an informed judgement about how close is a lamp to meeting
>
ISO-3664 requirements for graphic arts. The RHEM indicator is another tool
>
to confort us in our judgement but is not the panacea, I agree.
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