I currently have 2 x 39W 42" T8 lights and is thinking of upgrading to some T5 HO
. But the T5 tubes only comes in either 34" 39W or 46" 54W. My hood will not taking anything longer than 42", but the 36" seems a little bit short. Do you think a 36" will be strong enough to light up the ends of the tank? Should the tube run the full length of the tank?