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It is true, there is greater PAR under whiter light. The more blue, the less PAR, and less coral growth.
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NOT always true. XM 20K bulbs are more blue than XM 15K bulbs, but the 20K give off more PAR on the same ballast.
Because you have supplimental VHO actinics for color, I would go with 10K bulbs, I really like the look of my XM 10K with VHO actinic suppliments. If you want to save money and ditch the VHO, go with 20K bulbs. I have XM 20K and they look almost as good as XM 10K w/VHO actinics IMO.
03-13-2006, 02:43 PM
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