I have two coil UVB bulbs right now. I bought that as a quick and cheap way to get my new beardies bus UVB until I can research exactly what he needs. I didn’t want to buy expensive lighting before I knew which are correct. He is a rescue and I am a first time owner. I know and understand that he needs a UVB tube not a coil, the problem is everyone is recommending me to get an Arcadia 12%. His enclosure is a 4x2x2 120 gallon tank. I’ve read on here that the UVB tube needs to be 2/3 to 3/4 length of the tank but I only see the Arcadia 12% in a 22 inch….. this will be less than half of the tank. So is that still the tube I should get ? Do they make them longer and I’m just unable to find them? Or should I get a zoo med repti sun tube that is longer (like 30 or 36 in) ?