I bought a ceramic heater 250 watt "Heat wave lamp by Exo Terra" It states that you have to use it with there fixture brand name. I bought a heat lamp that is a 250 watt for poultry. I would think it should be ok to use it in that lamp that I have. What does everybody think. The other question is that we don't get much colder than -10 C / 13F . Would you put it on a timer and have it go off maybe during that day? We don't typically stay that cold for long. It off and on when it gets cold and warms up a bit again. We are heading back into another cold spell.