I have a Pygmy dragon in a pine wooden terranium with glass front which I got my son for Christmas. It is a 90cm(L) x 45cm(D) x 51cm(H). I am having trouble regulating the temperature with the heat white basking light. I have gone from a 75W bulb to a 50w and the temps where the thermostat should be soar up to 38-40degrees Celsius by then he middle of the day and I end up manually switching off the heat lamp. The temp at that point of the tank according to all I have read should be 32-34 degrees. I tried using an Eco Tech Advanced Reptile Thermostat with electronic dimming, timer and day/night function. All was working well yesterday when I set it up. This morning the heat lamp will not turn on through the unit but checking the lamp through a normal power source works fine. Reading further on these eco tech thermostats I see these are prone to failure and have caused fires. Any recommendations on what I should do? Should I drop the wattage of the heat lamp to 25W and forget the thermostat; or is there a different type of thermostat I should be looking at?