I personally am in favor of the VHO
, but many people will tell you that MH
is "more penetrating". (I think that a good reflector behind VHO
foccuses the light just as well.) If your tank has a center brace, you would need two MH
fixtures, so the expense of the project really goes up there. If you're on a tight budget, look at bulb replacement costs as well as initial setup.