Too small for agamids or desert iguanids like swifts...could do leo or fattail gex though. Maybe a small skink species? I think you have more choices with a jungle setup and frogs or small geckos, or even salamanders.
aborial... semi-aquatic... jungle...
You just discribed a perfict tree frog habitat. That would be fun unless you realy want the lizzard instead. If you have the money though you should go for red eyes, or dart frogs.
the problem with frogs are is that they sit there like all day
my brother's roomie had one in this sweet viv and it would sit there all day and then croak at night!
and plus we already have cool little tree frogs everywhere here and Im in northern canada