I have 7 six week old chicks (who I wish I moved out LAST week before the cold snap). My husband built a really nice little hen house for them, he built it inside a gazebo - which he fenced in for their run. My question is....It is in the 40s now at night. They will need a lamp for heat in the litte hen house. What size bulb do you recommend? Am I right in putting it IN the little hen house? They won't need one in the run area will they? I am a newbie, and they are my little girls chickens. Thanks in advance!!