They are 4 week old wyandotte and easter eggers.6 altogether. Not quite fully feathered but almost there. They are in the house but haven't been under the light since 2 weeks old. I'm in California and our Temps right now are about 70 degrees during the day and 50 degrees at night. I've let them play in their coop during the day and they love it. I would like to leave them out overnight but worry about them getting cold.