my 23 7 week old chicks will be going outside tomorrow in a playpen inside the chicken coop, after about a week i will open up the playpen panic doors then after a week the playpen will be taken down. My question is, do they need a heat lamp in the playpen still? Im almost positive they don't, but I like to be reasured. the lowest temp for this coming week is 37 degrees with highs of 77!!!!!