My Reptisun T5 HO 10.0 UVB bulb just arrived( not the hood, just the light) and I have some questions about it. First, what size lamp hood do I need :?: ? It is 22 inches, but all I could find were 24", 30", and 36" hoods :| . Also, how do I set it up under the tank lid? It is a glass terrarium but I have a metal barred thing on the top instead because my cats were trying to get in :? . Here are some photos: