how do you tell how many watts do you have i have two flouresent lights and they say 4*22 watts and i ahve two of them. so do i have 88 watts on each side for a total of 166 watts?
2' bulbs are 20 watts for normal output. If you have 4, that would be 88 watts. Divide gallons by the watts and you have the WPG. Use ONLY as a general guide. NO's are good for a FO tank IMO.
HTH
