I have an insulated coop, that holds a steady 50* with no electricity. I have approx. 9 chicks coming in 3 weeks and will be keeping them out in the coop, inside clear tubs I have set up as the brooder. With that being said, will I need to have a red light to help heat the coop more for the new chicks I have coming, or will the 2 feather dusters hanging in part of the brooder be warm enough for them ? Our daytime temps have been in anywhere from the mid 50's to the low 70's with overnight temps getting down to upper 30's. Thank you all in advance for your help and advice!