You can try it and see what the behavior is like -- any changes like eating and his pooping and what they look like -- I dont know of anyone using a dome w/ out a reflector -- I am going to inquire about this and see what I can find for an answerThe dome i have has a reflector but can it work good without a dome with a reflector, really dont wanna change the decor since he seems to like. As long as the temps are good its fine without the dome w/ reflector?