Welcome to the Forums! Too much UVB can be negative for the chameleon. You will want a 10.0 UVB light(linear florescent is best in my opinion), a basking light and a grow light. I throw the grow light in there because I'm hoping that there will be lots of live plants in your new chameleon's enclosure. You do not need to mimic the moonlight. In fact, your chameleon will want complete darkness. No heat source or lights at night at all. If you will post a pic of your enclosure, it will be easy to see if everything is in order for the new arrival. Have you done research on supplementing, hydration, gutloading the feeders, etc..? This is a great place to get all the information you will need to be successful at raising your cham. Congratulations on the upcoming arrival!!