If you are using CFL without a thermostat, and can regulate your temp by providing the correct amount of insulation/ventilation... then it could work. But, if you are using a thermostat, which will give you a MUCH better temp control, and therefore a much better hatch, with far less likelihood of temp related deformities in your chicks, (can you hear my bias here????) the CFL wouldn't work for several reasons: The constant on/off cycling of the bulb will not work well with a CFL. And the CFL doesn't produce as much heat. Many home made bators have 2 incandescent bulbs, so that if one quits, the other will keep the bator up to temp. They cycle on and off many times in an hour. If you were to add up all of the "on" times over a 24 hour period, and do the math, I think you'd find that your bator really draws very little power. IMO, not enough to jack up your bill. If you're interested in cutting electricity use, how bout unplugging all of the appliances (TV included) that have the constant availability feature. All of those LED's burning in so much electrical equipment do eat up the electricity over time. Have you switched to CFL in all of your lighting fixtures? Huge savings there.)