Shelz, it is safest to use a bulb made for animals, and not a regular bulb. Some of the regular bulbs are teflon-coated, and not safe to use with birds. I also use a red bulb with my chicks. Make sure that they can move far enough away from the bulb to stay comfortable and not overheat.
We had our first clutch in February and the temps were plummeting to -20 at night. Did not lose a single chick.
