I used hibiscus predominantly in all my chameleon cages.
Albeit Ficus is easier to care, Hibiscus is imho the best plant you can get for chameleons. Their branches are sturdy. They can grow quite tall. and the leaves and the flowers are completely safe to eat (they also contain vitamin C as an added bonus for your chameleon).
Unlike Ficus, whenever the branches broke, it won't exude milky sap that can irritate your chameleon skin and eyes.
I used 3 lightings essentially for chameleon's cages with Hibiscus.
1. UVB lighting for the chameleon
2. Basking lamp for the chameleon
3. Plant light for Hibiscus (available at local home depot, wal mart, and Lowes).
I also put some earthworms inside of the hibiscus pot.
and I raised the pot couple of inches above the cage bottom to avoid flooding (using plant stands).
So far, I have no problems keeping hibiscus at all.
As a safe precaution, might be a good idea to buy 2.
Put one in your chameleon cage.
and, when the weather permits, put the other one outside to bask in the sun. and once in while, rotate the plants.