After reading all these arguments, I’d say that heat wise, the two types are identical. Any savings from fluorescent are pretty much offset by add’l heating cost. However, in the summer, the fluorescents will be a boon, reducing both your lighting costs and cooling costs. Rather than deal with 2 sets of bulbs, go for the fluorescent.
Get some cats for the winter months. (click on the HEAT TRANSFER link to the left)
here
here
here
especially here
if your concerned about your chickens
and finally here
If you would be so kind as to allow me to retract my earlier post regarding this issue. I`ll will say that the incandescents will add heat to the house. In the summer too.
A point to add to the discussion is that the thermostat is either mounted on the baseboard (electric) heater or on the wall nearby.
The heat rising from the baseboard heater will have way more effect on the thermostat than any incandescent lighting will. Since much of the heat from the bulbs will stay near the ceiling.