Quote:
Originally Posted by fkshiu
You'll only need 3 MHs over your tank if you have mediocre reflectors like the little ones you get with the Outer Orbit. Two Lumenmax reflectors over my 72" tank covers the entire length just fine.
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Probably very true of the outer orbit. I have a 36" Outer Orbit with 2 - 250 MH and it covers the 40" width of the tank nicely. I don't know if 2 of them in a longer fixture would cover 60" efficiently.