I am currently building a new enclosure for a baby that is on his way. I built this one for a monitor (which ended up being used by a Bearded Dragon) and plan on doing something similar. My question is in regards to heating.........how is everybody heating large enclosures (8X4X4 and larger)? Does it make sense to enclose a space heater connected to a thermostat for ambient temperatures or can these larger enclosures be heated with bulbs?