You were right in that you don't want to leave the lights on all day, it can put a lot of stress on both your frogs and plants they need time to rest. I put the lights on at night because we have been having unusually cold nights here in southern California. I put the lights off during the day when it is warmer, that way my frogs can have some period of dark and not get to much of a temperature shift between the day and night. Also the idea of the space is a pretty good idea but you need to be careful with those things because they are known to be a signifigant fire hazard.
1.1.0 D. luecomelas
2.1 Felis domesticus