Any time Kirsty, so your little one is about 2 mo old? then temps at 105 minimum would be good. I've never heard of that type of tube light. When you can, try to get a Reptisun 10.0 or an Arcadia 12 to 15%, they've been nominated best UVB for years. I'm sure your little one will be fine now. So you have a 40 gallon breeder? They're 3' long by 18" high by 18" deep. That's what all my adults are in, as I have 5 in a 1 bedroom apartment. I make sure they get outside time every single day, so their tank is used for basking and sleeping. I'd love to get them all 75 gallon tanks, 4' long, 2' wide and 2' high as my friend has, but I just don't have the room. They're all in the living room along with 2 geckos, so I have alot of tanks in my living room/dining room. I live alone, so I go out to visit my family and friends, very few want to visit with so many tanks & dragons/geckos so close LOL