Join Date: Jul 2010
Location: Outside Philadelphia, PA
I use a 4 bulb T5 HO fixture on my 90 gal planted tank. It is suspended on cables and placed a bit higher that it would be with the standard legs you get with the fixture.
The one big advantage of a 4 bulb fixture is that the light is spread out better front to back.
I generally agree with the others. Try what you have and if needed, add a second fixture. Since you have a deep tank, and CO2, your system should be able to handle the larger amount of light.