I am expecting 8 baby chicks on Sept 4th. I have a box ready with a light bulb for heating, 60 watt. Is this enough warmth for 8 baby chicks.....? Am in the Atlanta, Ga area and we are not cold by a long shot as yet....to be 90 degrees this week. Have hung the bulb relatively low in the box but not low enough that they can reach it. Just curious, do I need to go buy a heat lamp bulb?