My dog house converted into coop (pictures coming soon!!) is nearly completed. Total size is 30" x 40+" ( a little more with 12" nest box) for two standards who are now going on 5 weeks. I'm ready to get them out there but I'm wondering if; A. Should I still keep a light on in the coop? B. What wattage? I'm guessing my 250 heat bulb is going to be a little too toasty in the small space. and C. a little off topic but... Provided that my run is a secure as can be is it ok to leave their door to the run open all night?