The 150's are nice lamps but you don't get a lot of spread out of them. For a 20" tall tank they might still be OK. I have a 150W over a 20g tank, 20000K lamp. Nice lamp, nice colour, but really (at least at that colour temp) not quite a lot of light. A 10000K or a 14000K lamp might be a neat choice though.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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