They don't need the light. They jump up there to explore. give them a branch to roost on. They will go under the brooder plate when they need a warmup. Also, make sure you raise the legs on the brooder plate as they grow. If they are flattening themselves under it, they need more room.Many, many thanks to all who gave advice and helped us become a safe, healthy stress free flock. My gratitude is immeasurable.
These ladies decided they like sunbathing on the upper deck. I turned on the light near, but not in the brooder to warm up the ambient temperature in the area for a little while. They seem to like it.