Marlinchaser - my issue is that I want to put them outside with NO light since we'll be on vacation, so I want to know what the minimum temp they can tolerate at night will be. My husband doesn't like the idea of us going on vacation and leaving a dangling light above straw, especially because we have severe fire warnings going on around here because we're so dry.
If we were going to be home, this would not be an issue. I'd be home monitoring them and could bring them in at night... but we have to leave for vacation when they're about a month old. We'd like to keep them outside in their coop, but can't make this decision until we know what the minimum temperature is they can tolerate at this age.