A few months ago I wanted to use bougainvillea in one of my cages (I didn't care about the spines, chameleons are definately capable of dealing with them), but it lasted a week before it dropped leaves/flowers and had to become an outdoor plant. The lighting requirements were just not there. So I suggest that you experiment a little - as long as the plan it on all the safe lists, you know there isn't a health concern to worry about. If you have a garden, you can always move the failing plants outside to recover and live permanently if they don't do well in the cage. But see what plants can live without intense light, and can deal with a lot of water, and see how it does in the cages.