[Jerzeedevl]

Before I upgraded to a 29 gallon tank I had a 20 gallon high. My light is a 4 bulb t5ho 96 total watts. I'm able to control two bulbs at a time. I loved it on that tank. The only problem is you have to have co2 and ferts and you have to find the right balance between all three to prevent algae. My point is your 4 bulb fixture isn't too much if you're willing to add co2 and ferts. As for bulbs I have 2 10k and 2 67k. With that light, co2, and ferts I have amazing plant growth. Just have to find the right combo!
Good luck!

 

[sam2000001]

Thanks Jerz, I'll be doing some more research on getting the right balance.

 

[Steve002]

I agree that if you can run 2 bulbs at a time that should give you a high amount of light (will need a CO2 system). Four would be too much. That said you can always tone it down by raising the fixture higher, putting window screening between it and the tank, and/or using floating plants on the surface. Using a rosette bulb like the Colormax plus a daylight bulb 5000K to 6700K would work well.