I've got 4 two-week old babies - I was hoping to move their living quarters outside in a week or two - Not into the big coop with the grownups, but to something smaller that I'm going to throw together. It's still pretty cold in Michigan - We're going back and forth between days with snow and other with sun - Nighttime temps are in the 30s. If I provided a light, is it still too cold for them outside? Should I instead make a larger brooder for them to hang out in my basement? They will definitely be outgrowing the fish tank they are in currently, so I'll need to do something... Thanks for your advice.