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In the 1997 Greinger catalogue (no.388) on page 1042 there is some
information on Fluorescent Lamps. The heading is GE Lighting, then there is
the subheading "Color Rendering Index (CRI)" under which it states:
"The CRI of different sources can be compared only if the sources have the
same color temperature."
I'm not sure how to interpret "sources." Does this mean that we can compare
the CRI of, for instance, a 6500K flourescent bulb with another 6500K
flourescent bulb, but can't compare the CRI of, for instance, a 6500K
flourescent bulb with a 5000K flourescent bulb? Or by "sources" do they mean
fluorescent, incandescent, HID, etc., in which case it would just mean that
we can't compare the CRI of a fluorescent bulb with the CRI of a HID bulb
unless, for instance, they are both 5500K bulbs, but can compare the CRI of,
for instance, any fluorescent bulb to any other fluorescent bulb? Or are
there other possible interpretations?
smskahj at netacc_net