I have a mercury vapor grow light that I use for my indoor plants, but I am not sure if this is will work for a reptile. I know that there are mercury vapor bulbs made specifically for reptiles, but this one is for plants. I will be giving the (jackson) chameleon regular access to sunlight, but I will need to supplement artificially. The light is a 160w bulb with a ballast that is built into the hood. It produces good heat and hangs from the cieling so I can ajust the distance easily with chains to regulate temp. It would be perfect to use, but if it will harm the animal I can find other ways. If anyone has experience with this let me know.