How do I determine what wattage of heating element I will need for my incubator?

One of the simplest ways to determine what size of heating element you need in an incubator is what we call the light bulb test. To perform this test, you simply place a light bulb(s) in the incubator with the approximate wattage that you think will work. If this heats the incubator to or a little above the desired set temperature approximately the same wattage of heating element will also work. If it goes over by a lot than you will want a lower wattage heating element. If it takes a long time to heat up or never reaches the desired temp you will need a larger heating element.