My bearded dragon reggie is in a 4x2x2 enclosure but is only using half right now. i put up a piece of cardboard to help with stress but i was wondering when i should open it up to the full thing? i saw someone say to do it around the 3 month mark which he will be in March but i dont remember where i saw it. would that be good to do? i dont plan on upgrading to a t5 until may i think if that makes a difference at all. the t8 is mounted inside right now.