ya i'm with jkhchris, they do try to often go cost effective as possible alot of times, when i got my cup coral colony a couple months ago, it was a dull brown under there lights and i really just got it for it's sheer size, but when i got him settled up high in my tank he turned an intense fluorescent green, wierd color change, by far the most intensely colored hard coral in my tank. Then again they were running 10k's, so the true color wasn't exactly shown. good question though i always wondered that too..
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