Lighting suggestions for a 20 gallon long (30")

[Vmax911]

I'm having trouble finding lights for a 20 gallon long tank, which is 30" in length. The trip to home depot yielded and abundance of 18", 24", and 36" lights. Do I need to settle for 24"? I know they make 20L/29 gallon hoods, are there really 30" bulbs in there, or just 24" with 3" dead spots on the sides?

Once I figure out a suitable bulb, I'll worry about WPG. I know the wpg rule breaks down on smaller tanks, but a 20L has the same footprint as a 29 gallon, but only 12" tall. So maybe I gain a little here?

Also, I will probably dose excel. Does that make injecting CO2 unnecessary?

 

[Peyton]

I had a 55w All-glass CF fixture along with a dual flourescent fixture over mine for quite a while. The problem is, as you have already figured out, that you have dead spots in the tank that recieve less light. If you can find a fixture that doesn't rest on the hood but suspends above it I think you could cure that problem.

 

[Vmax911]

So there may be no "perfect" solution. I am thinking of doing a DIY hood using 2 18" bulbs, and just have them overlap in the middle. Then I could over-drive them and get some decent light.