My chicks are two weeks old today. Thus far they have been cozy inside a cardboard box brooder inside my house. I'd like to move them into their coop (see pic). I am experimenting today with this little brooding set up (see second pic), but I have concerns. Several of them have lain under the lamp and held out their wing. Are they cold and are they trying to warm up. What about overnight? It will get to 28-30 degrees, even with the 250watt heat lamp, and the second 125 watt flood bulb, will this be safe to do???