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"kristiananderson" asked about preferences between a 96W and two 55W
bulbs for a thirty gallon tank.
I strongly recommend the 96W fixture. The bulb and socket assembly
fits perfectly in a 36" hood, giving even lighting to the entire 36" tank.
Also, 3W plus of PC lighting over a 16" tall tank will be all you ever need.
Two 55W fixtures will overlap, causing a bright spot in the middle of the
tank, and either forcing the use of a less efficient reflector or making the
hood that much wider.
My thirty gallon tank with one 96W PC is my "grow anything, and
beautifully too" tank. My 65 gallon (also 36" long, but 24" tall) does great
with two 96W fixtures on it, but some stuff grows leggy until it gets halfway
to the surface.
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