well on another forum someone has 2 CFL's 36 watts each on a ten and she has minimal algae so far plus i have a dirt bottom, im dosing ferts, and i plan on doing DIY Co2, plus ill have a large floating plant.
oh and do you really think itd heat the tank? the tanks not heated but i dont want to fry the fish. i also picked the light so i could upgrade to a 20 high.
I would be interested in knowing how high that person has them hanging above the tank. 72 watts on a 10 gallon tank? Wow is all I have to say. All of the mitigating information you supply for your tank is good to know, but I'm not convinced you'll be trouble free with that much light. Of course I'm willing to be wrong here!!
10 gallon tanks are notoriously unstable on many parameters, especially temperature. Again there's no way to know exactly what the temp will do on your specific tank, but experience and general wisdom within the hobby points that way. There's a reason "kits" come with 6-9 watt lights on 10 gallon tanks. Hoppy's got an excellent chart he put together with his PAR meter and various light levels. I don't have the url handy but I think it's a sticky in the lighting forum. I do, however, have this thread saved, and if you drill down a bit, you will discover the outstanding work i4x4nMore
did examining various CFL configurations and how important just a small adjustment can make in their orientation and height above the tank. He explains it with detailed Powerpoint slides and makes it interesting.
I see this thread is a sticky too! Good! Excellent work!
Here is Hoppy's thread:
All the best!