Hello all! I've decided to put heat in my chicken coop. I know that the red light will keep them awake (and peck eachothers feathers) so I'm going to get one of those ceramic heat lamps. It screws into a socket but emits heat only, no light. Keep in mind the lamp will be secure with 3 attachments in case of an accident of some sort. I WAS leaning toward using no heat but I've changed my mind. My coop is 4' wide x 4' long x 4' high. Their perch is at about 12" off the bottom. They would be about 18 inches to 2 ft away from the heat hanging from a brooding lamp fixture. Their coop door is shut at dusk and opened at daylight. They have a 4 x 6 ft run for during the day which they are usually out all day. We've added some weather stripping to doors and covered windows and sides of run with 6 MIL plastic. I think they are pretty draft free. My choices are 60 watt, 75 watt and 100 watt. I'm not sure when to use it ...24 hours or only at night. We've had 2 nights under 18 degrees already and I do not feel comfortable not giving them some warmth. What wattage would you use? When/how often would you use it? Thanks for ANY input!