My dingbat chicks refuse to come in for the night. Do I worry?

[TinyLittleFarm]

My husband was able to get them all in late last night. We've been putting them in the coop about a half hour before dark, but left them out just a little too late last night. Thankfully everyone is fine. Tonight they will have a proper bedtime!

 

[NurseDr]

My 5 week olds were out for thier first night. As I was watching them as the sun was setting. Hoping they would all figure out to go into the raised coop in the tractor I saw them following the light around. So I turned on the brooder light in the coop and that seemed to attract most into the coop. Except two, that I fetched because it was getting cold. Anyone else seen them follow the light?