You can really tell that they're getting something they want from the sun, that they don't seem to get from their UV-B lamps. Thaxter loves to be outside (to the extent of reaching for the door if I carry him past it) - and hates to come back in. I bought my screen Reptarium for taking chams outside (they free-range indoors), but haven't used it much - I let him wander about free, but do not let him out of sight. He'll bask for up to an hour or so, then wants to set off to explore - the peonies, the spruce tree (which I let him climb to five feet). He wants to go under the car, but is not allowed. I've walked halfway down the block, keeping an eye on him and strolling along at his pace - if he were left alone for five-tem minutes, he'd be gone (not to mention the raccoons, possums and feral cats in the neighborhood). But with supervision, it's Fun For the Whole Family.