Joe : I used lamps from Duro-Test with a CRI (color rendition index ) of 94. You should look for lamps...See more as close to CRI 100 as possible (CRI 100= sunlight). It should also be noted that lamps lose lumins through use so don't wait for them to burn out, they should be replaced yearly , working or not. Also I was advised not to use diffusers (grills ) of any kind.
Hope this helps.
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