My Dragon is currently in a 20 Gallon tank...and im just curiuos what watt of basking light i should be using. i ordered a 75W but they mistakenly sent me a 150W im afraid that maybe thats to high for just a 20 gallon and i dont want to overheat my beardie. I also didnt realize how big the bulb would be when i ordered it i have a normal light dome and the bulb actually touches the mesh lid, is this unsafe? i plan on ordering a deep dome but was wondering in the mean time if its saft for the bulb to be touching the mesh.