My chicks are 2 1/2 weeks and seem to be feathering well. They are in basement in brooder with a red 250 watt bulb. They are out growing brooder and new coop is ready, insulated with ventilation. I want to move them outside, but not let them out of coop to the 8x16 run for another week. We are in Michigan and temps have been around 70, dropping to mid 30's each night. ( ya gotta love Michigan) Question is: if I move them out, how long do I supply 250 watt red heat bulb for? Eventually I want to go to just a heated waterer and when laying some supplemental 60 watt or so light to increase daylight from 8 to 9 hours to 14. SO how long on 250 watt heater? Any ideas? Thanks.