Never heard of UV filter helping but the experiment is not hard to do. Seems
this should be a largely solvable issue. (I am not an engineer and no nothing
about stage lights except can confirm the photographic issues) The power
spectral distributions of LED's are notoriously peaky and with valleys
despite the usual
phosphors used. The CRI uses R1 to R8 and I have LED's in our bathroom that
make skin tones look putrid--at least I hope that is the problem. They have a
CRI in the low 90's but clearly bad R9 value as deficient in red.
Some recent ultra high CRI LED's use violet LED instead of blue and R, G, B
phosphors for a CRI up to 98 or so. The luminous efficiency is down to 65-85
lm/W though.
Spuriously sallow skinned? Mike
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