Has anyone taken a thermometer to their cookie tin water heater? I'm interested in what wattage bulb you have, the diameter and depth of the cookie tin, and what temp the outside of the cookie tin is. I made one today. The tin is 3.5 inches deep, 10 inches across, and I used a 60w bulb. I plugged it in on my kitchen counter (73 degrees in the kitchen) and it got to 213 degrees in less than 3 minutes. Its a digital thermometer I use for HVAC work so I know its good and accurate. I don't want this to burn my coop down and I don't want the bulb to keep blowing out from the heat. Interested in your guys heaters and looking for more precise data besides "warm to the touch."