Hi I am new to the tegu world. interested in getting a tegu soon. had a few question thought I try here for answers. 1) can I start with a 40 gallon breeder tank for a hatchling or should I build a cage 4x2x2 or 4x3x3. 2) I have a double deep dome light fixture will the tegu receive the right amount of uvb in there with the basking bulb? 3) if I build a cage with the top open will that work? thanks