I have a concern about our UVB light. We have a 75 gallon aquarium glass tank we were given. We have a Zoo Med item# LF -50. 60Hz, 29 watt, 60 Watt max. The bulb is a Reptisun 5.0 UVB bulb. The top of the tank is made of screen that I bought at Menards. I have the UVB light just to the right...