40 gal. tank. what size light?

[rottendj]

i have a 40 gallon breeder and a 150 wa bulb and it keeps my tank at 92 with 60 percent humidity no problem

sorry but whats a 40 gallon tank in inches/feet roughly?
do you have the lamp on 24 hours or on a timer and what kind of bulb is it?
many thanks...