First I'm a boy and I still haven't bought anything yet, getting finishing touches on what to buy and I am ditching the mat and going for lamps, I can get a thermostat but without dimable features. Also would the supplemental ceramic heat be only in the winter?
Boy, got it.
A normal on/off stat will work but you will also need your fluorescent light fixture to make sure the enclosure doesn't go from bright to dim all the time throughout the day.
When you need to provide supplemental heat will depend on the ambient temperatures in your room, irrespective of season. Have you read Elizabeth's care-sheet? If not you absolutely should, she was the lady asking you some questions at the beginning of this thread, its linked in her signature there.
Also, if I were you and if you can, id rethink the enclosure dimensions, it really is a little small for an adult Leopard Gecko in my opinion. There are options available to you if you can wait for dollar per gallon sales etc, Leopard Geckos really love space to explore, I house mine. for example, in enclosures measuring 4x2x2 feet and they use all the space.
Your original posts about keeping a gecko in a natural setting are great! It's just that those ideas (at least for leopard geckos) conflict with available $.