Hello,i have 6 4 week olds that went out to the grow out coop last week.They are LF,production reds and not sure what the others are.Its 3 1/2x5x6 insulated(except the roof)and i put a 250 watt and 100 watt heat bulbs in with them.We have had some pretty cold weather here so im wondering when is a good time to start backing off some of the heat.When its sunny i turn off the 250 during the day. but put it back on at night.It will be 30 tonight,but is dropping down to about 25 later this week,with daytime temps of mid 30's.So i would appreciate some advice.Thanks in advance for any help...