Do they need light (not talking about heat)? It's about 90 today, and even hotter in the coop/brooder. When i turn off the heatlamp it's dark in there-will that be ok? There's a little light coming in the window but the coop is in the machine shed right now so no sun is going in there other than what is coming in the shed doors. I thought about putting in a different bulb but I only have one fixture and don't want to bother with letting each light bulb cool off before switching them out and don't really want to keep switching them out anyway (my luck I'd probably break one). Or should I put a battery lantern in there for a while? forgot to mention that they'll be about a week on Wednesday (not sure if they hatched out Tuesday or Wednesday-we picked them up on Thursday at the feed store and they were mailed from ideal poultry in TX).