I've been keeping veiled chameleons (one at a time) for quite a while. I recently purchased a Solar Meter (UVB radiometer 6.5R) that measures the UVB received at any location in the cham enclosure. I have a 24x24x48" screen enclosure. I have always placed the basking dome in the rear left corner of the cage top and the UVB/daylight 22" tubes (2 daylight, one 12% UVB arcadia tube) on top towards the front of the cage, the way everyone seems to do. The rule is that the cham, when basking, should also be getting his required exposure to UVB. But here's the problem: the UVB reading 4" below the UVB tube is 3 on the Ferguson scale, the correct intensity the cham should be getting when basking (basking temp is ±85). But the basking light is some distance from the UVB source, and the UVB under the basking light alone is insufficient (only about 0.2 or 0.3). Since chameleons are sensitive to temperature, they will instinctively move towards the basking area. But they can't sense UVB, so there is nothing to get them to move to another location to be under the UVB lamp. Both should be in the same place. But how? I can't put the heat dome (10" across) and the UVB fixture (24" wide) in line with each other, so I don't see a way to ensure that the cham gets both heat and enough UVB at the same time. It's a problem because according to my solarmeter, UVB drops off rapidly once the cham moves a few inches from the center line of the UVB light source. I never thought about this until I went out and spent $249 for a solarmeter and was shocked to see how fast UVB drops off just inches from the source. Anybody have thoughts about this?