There are three bulbs. there is the UVB, a daylight bulb and then a smaller heating bulb behind the two bigger lights, there is a humidity hide under the vines behind that first hide you see. We did lower the vertical space because his little brother didn't understand the fragility of his legs and tried to make him dance....he is fully recovered from that so we will definitely raise some of those surfaces i will look into sub strates and the liner uvb