I'll go pick one of them up tomorrow. The 150 watt ceramic bulb I have says that it heats up the air 18 inches from the bulb to 89 degrees, so my temp of 88 doesnt surprise me too much, which is why I dont think it is 90+ degrees as in your case. Maybe I am wrong tho... But I think my thermometers are working because as my ambient temp in my room increases when I turn the heater on, so does the tanks. And it lowers when it cools off. But ill go get that thermo tomorrow.