Planted Tank Obsessed
Join Date: Dec 2002
Location: San Antonio, TX
I have those over a 10 gallon tank. I have been thinking about putting a third bulb over it, but I don't have any CO2 on it right now so I think it would be a waste right now.
How do you plan on wiring three bulbs onto a two bulb ballast? I'm not sure how the ballast would interpret an odd wiring scheme like 2 bulbs on one output and one bulb on the other output. I have found electronic ballasts to be very flexible so it might work.
That ballast has a total output capability of 64 watts, so even if you overdrove those you would only be pushing 19 extra watts down those lamps. So not even 1.5x overdriven. Though like you say, that may be total overkill for such a small tank. I think 45 watts would probably be about the limit on a 10 gallon tank without seriously destabilizing it.
The other option (and I totally spazzed when I was writing the email and forgot that you mentioned 3 bulbs) is to get a 3 bulb output ballast. I believe they make those, though they may not be commonly available.