Hi, Our russian tortoise,Leroy, has pretty much been inactive since may. We thought it could have been his mvb light being old so we replaced it with a PowerSun 100w mvb. We kept it in for 3 months but it seemed like he would kinda stay away from it, like it bothered him. Then I purchased a SolarGlo 125w mvb and same thing. The mvb is 14" above the top of his shell, with a Che light on one end and a regular incandescent on the other. I'm starting to think mvb's are not all they're cracked up to be. My question is will the 48" Reptisun I just bought be too big/bright for his 5x2 enclosure. If it is I will return it but I'm not sure if I should then purchase the 24" or 36" instead. I've included a pic of the ReptiSun I ordered