/\ Agreed... I have the med-low Exo-Terra (24x18x12) with a uth/thermostat and the exo-terra 3-lamp fixture to provide ambient temps. I use (1) exo-terra 25 watt day lamp and (2) 25 watt night/blue lamps. This maintains ideal temps (~91 hot - 78 cool); however, I need to mist constantly morning and night even though I tightly covered 3/4 of the top with plexi-glass (even with coco and moss substrate) . Heat lamps and/or ceramic heaters (CHE) will dry out your cage quickly... I spray in the morning and humidity gets over 70% but dives below 50% to 30-45% by the time I get home (to repeat), it's a hassle.
I should have ordered a boaphile pvc cage with a heat panel and plan on doing so quickly. The exo-terras are quality cages but no so good for a BP (you should also cover 3 sides anyway which defeats it's purpose) - I might repurpose my exo-terra for a desert-type herp or use as a secondary/back-up cage. Trust me here, if you do end up with an exo-terra, cover the sides with some paper/background, cover a large part of the top screen or replace it with plexi, and don't use lamps or a CHE (IMO), consider affixing a radiant heat panel for ambient temps if needed.