I searched but wasn't able to find the answer to this question, so forgive me if I'm making a repeat request for information. I'm about to put my approximately 6 week old pullets in the coop soon -it's almost finished. Please clarify for me what kind of lighting the chickens will need in the coop for this time of year. It's been a little cool in Seattle this spring and I want to make sure that the girls will stay warm. Do they need a heat lamp right now? Do they need lighting at all? Is it possible they will need a heat lamp in the late fall and winter or will the 60w bulb they'll need for regular daylight be enough?