Re: Just Normlicht vs. Graphiclite or GTI
Re: Just Normlicht vs. Graphiclite or GTI
- Subject: Re: Just Normlicht vs. Graphiclite or GTI
- From: "stevej" <email@hidden>
- Date: Thu, 5 May 2005 19:42:25 -0400
Steve,
Yes, I agree this is confusing...
My only point is that if you load these spectra into
i1Share you'll see why Mr. Holm's original observation
is difficult to understand/comprehend...
According to i1Share:
JUST lamps = 96 CRI
GTI lamps = 90 CRI
BUT if you look at the spectral distribution of the JUSTs
they look more jagged...
I'm still not sure what to make of all this...
Thanks,
Steve Jenkins
----- Original Message -----
From: "Steve Upton" <email@hidden>
To: <email@hidden>
Sent: Thursday, May 05, 2005 07:23 PM
Subject: Re: Just Normlicht vs. Graphiclite or GTI
> At 7:06 PM -0400 5/5/05, stevej wrote:
> >Steve,
> >
> >Thanks for your quick response but please don't put
> >words in my mouth. I don't remember implying anything
> >about which one was "correct". In fact my last words were
> >"go figure". All I was trying to show is why this happens.
> >Please reread my original message.
>
> sorry about that... not meaning to put words in anyone's mouth, just wanting to clear up possible confusion.
>
> when you wrote
>
> >"> >Since RHEM strips are especially susceptible to red metamerism
> >> >and the JUST tubes have a sharp drop beyond 650nm, you've
> >> >got metamerism even though the JUST lights DO have a
> >> >higher CRI. Go figure..."
>
> I took the "you've got metamerism even though...higher CRI" as a direct comparison between Just and GTI illuminants but I find the logic unclear - the metamerism is between Just and GTI but CRI is between Just and D50?
>
> does this (my confusion) make sense?
>
> I'm still curious about how each compares to D50...
>
> Regards,
>
> Steve
>
>
> ________________________________________________________________________
> o Steve Upton CHROMiX www.chromix.com
> o (hueman) 866.CHROMiX
> o email@hidden 206.985.6837
> o ColorGear ColorThink ColorValet ColorSmarts ProfileCentral
> ________________________________________________________________________
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