Setting up planted desert vivaria

[GekkoGeck0]

I have a 15 gallon terrarium with 1 web-footed gecko. I've been wanting to add some plants to liven it up a bit, give it more of a realistic feel.

Right now, I have one habba hut (the little hollowed out half log hides), his waterbowl, and a small cap full of food for stray crickets. Pretty boring. There is approximated 4-5 inches of playsand as a substrate.

My lighting consists of two of those flourescent tubes that go into standard incandescent sockets... forget what they're called right now. But the lighting is rather intense.

Does anyone have any examples of desert vivaria or suggestions? I'm looking at having some spineless cacti and/or succulents. The plants have to stay rather short (or can be pruned back with no adverse effects) and be able to tolerate temperatures between 25C (75-77F) and 30-35C (86-95F) with 30-40% average humidity (not minding a misting every few days).

The web-footed gecko is rather small, just 10cm from nose to tail, and most likely wouldn't damage somewhat delicate plants, aside from his constant desire to dig. I plan on surrounding any plants with small smooth rocks to stop him from digging the plants up.

Any ideas from anyone or some pictures of some planted desert vivaria would be very appreciated!