Thank you for reply. Crockpot seem as good and easy way for kiln, but I already have heat source and humidifier separately each with sensor and controller. The new (200 W) heat bulb seem to be working well so far. When the first terrarium heat bulb broke, I used fruit drying machine (350 W, there is a little fan in it) and one classic 60 W lightbulb connected with temperature sensor. It was taking twice more electricity but worked while i was waiting for terrarium heat bulb.I have an upright old freezer for my kiln, and a crockpot for heat/humidity. Fresh air intake is a 2-inch pipe near the bottom, and a 1/2-inch pipe for exhaust near the top. The lid on the crockpot is offset slightly to increase the RH. I have no problems maintaining proper case of leaf & heat/RH to ferment tobacco or even flue-curing.