perfect tank size for a single 150w halide

[gotbags-10]

I'm wanting to build a tank for a single 150w pendant that i have. I'm wondering what size to make it though. I want to do a cube of some sorts. Not sure what the effective depth of that type of hallide would be. In case your wondering i will be using a 12k reeflux with actinic. Thanks for any input

 

[jddaniel]

I vote for a 40 breeder(36x18x16). I have a 50 breeder which also works well, but you have to work around a center brace which makes a couple pretty shady areas with a single halide.

 

[mdt178]

w/o actinics: 20x20x18
with actinics: 24x24x18