Thank you for your help I appreciate it. I am thinking of having the lighting about 15-18 inches above the vivarium. I would have made my vivarium taller but when I started building it I wasn't planning on getting thumbnails but then my brother got a pair of vents and it inspired me to want to get a pair of thumbnails too. I am almost done with my vivarium I just need to attach the door to it i will be able to post some pictures sometime this week and again thank you.