I use two 100w bulbs on a dimmer switch. If you only have 1 bulb and it blows, you'll have dead chick's if they're young. That's why I use two bulbs. Here's my design....What happens if the bulb pops? Anyone had to deal with that? Seeing reviews of bulbs constantly popping. Are the chicks safe or will they end up eating the smaller shards?
Going to keep mine indoors for 3 to 4 weeks so a 75 to 100 Watt bulb should be enough.
https://www.backyardchickens.com/threads/diy-storage-tote-quail-chick-brooder.1247747/