Most monitor keepers agree that UV lighting is not required. They say that the skin is too thick to be able to absorb anything from it anyway. On the other hand I know tegus DO require it.. but I don't think ackies need it.

A 30 gallon long tank is considered big enough for one adult ackie.

The thing about chameleons is they are much more of a 'look' pet than a 'touch' pet. They are normally quite shy and stress easily, though veiled are less so than some other species. Ackies routinely tame down quite easily.