blackbearded":5334b said:is all about your ambient room temperature i'm having problems with my basking temps i have a megaray 100 watt and my ambient room temp is above 75 degs.I got a typical crossfire design 40"l x 21"h x 24"w i'm now in the process of getting a reptisun 10 you should look into your ambient room temps where your setup will be at and your current weather condition if you live in a run down apt building with no heat in the winter. hope this helps.