I have a 20 gallon tank with a 75w basking bulb (was 150w till I changed it) and a 100w MVB bulb. I have tiles mainly for the bottom. One minute it says 90 degrees, next 98 degrees and by the mid day it gets to 104 to 108 degrees. My dragon is not happy, but also shedding. I have the MVB bulb depending on the temp anywhere from on top of this 12 inch tank pointing twards the basking side, or 24 inches above as we speak and the basking is reaching 104 degrees still. I move the basking little to left, and little to the right trying to adjust his temp it seems many times a day! He openes his mouth alot at me. I have a digital temp. guage I use in different spots to check the temps. There is 90 degrees on his wood one minute , then 98 and goes up to 108. He gets mad at me by this temp. Please help here. I don't know how to submit a pic on here..Thanks!