Rodger,
I agree, that peaks look nasty, but I think that is a graph of standard
4000k metal halide bulbs - the graph at
http://www.venturelighting.com/NaturalWhite/NaturalWhite_TechCenter.html
looks much better. Although it still has some spikes, it at least mimics
daylight fairly well (though I could be reading these wrong)
As per Danny Pascale's suggestion, I am contacting Venture to see if I can
get information on the 8 special indicies that make up the CRI rating.
As far as lighting levels go, the ISO 3664 spec of 2000 for inspection and
64 for computer design both seen a bit extreme. I can only imaging the
amount of time it would take for my eyes to adjust going from one to the
other - I was thinking something more like 80 for the computer design, and
1200-1400 for the inspection area. These seem to me to be better practical
levels. Any thoughts?
Charlie
On 7/15/05 1:57 PM, "Roger Breton" <email@hidden> wrote:
> Charlie,
>
> I'd be weary of all those peaks as they will surely cause metameric
> nightmares. Just look at the SPD here:
>
> http://www.venturelighting.com/TechCenter/Lamp-Color.html
>
> FWIW, I advised the unversity where I teach to put in regular Phillips
> ColorTone fluorescent tubes instead of the ulgly warm white they used. This
> is for a graphic design 25 G5s student lab. I recommended they instead got
> Solux desktop tasklamps for each stations but, believe it or not, that fell
> under another budget. At least they were able to change the lamps and they
> made all the difference.
>
> Regards,
>
> Roger Breton | Laval, Canada | email@hidden
> http://pages.infinit.net/graxx
>
>
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