Sounds goodI'm using a reptile heat mat with a thermostat .it's about a foot long and situated at one end of the brooder. .has been working fine since I started hatching my own chicks last year and the brooder is about 5 feet long so I don't think the heat can disperse that far..

(Too many people use a heat lamp in a plastic bin that's not nearly big enough, so there really is no cool place. So I wanted to make sure!)