I have a quick question about the UVB light. I have the recommended one for Spike, the reptisun 10, the one everyone says to use. THe question I have is I am using a fixture from Walmat, but I just now realize it has a plaster cover over the bulb...should I take that off? I am trying so hard to make sure spike has all he needs, he is only 7 months old, but I didn't think about the cover until today. We have had him a month, so not a huge time. But any help is appreciated.