Originally Posted by Mr. Fish
As of right now I only have 15watts-6,700 K (T8 Life Glo) beaming over it and was wondering if I should just go with another one or change out this for some T5 HO's? I don't mind building this thing myself, I'm experienced with lighting and ballast wiring so if needed I can make my own fixture.
Also does the combination of 6,700 and 8,000k work better as opposed to 2 6,700 k's?
Two T8 tubes would probably put you in the medium-high category. You could get the same with one T5 HO. Two T5 HO tubes would put you in the high light category.
Color temperature does not have a direct relationship with PAR, so use the tubes that you like best. (Except for Color Max tubes, which show almost no useful light when measured by PAR meter.) Using two different types of tubes may give you a better mix of wavelengths, so this may be a good idea for that reason alone.