They should sleep through the night without light - they do not need to eat and drink at night.
So I dimmed the lights last night, helped them all find their way to the brooder plate. 5 of them snuggled in under there, two decided they were more comfortable on top. Turned off the light, and one jerk just starts the angry chirps. I let her go for about 10 minutes, shes just chirping very loudly, so I stuff her under the plate, she makes a big ruckus under there and pops back out.
Honestly, I have the Ecoglow 20 and I feel like although its rated for 20 chicks, anything older than day-olds, you cant fit 20 under there. With my almost 2 week old chicks, I feel like its too small for 8.
We had planned to build a wool hen, that might be a project for today because I feel like some of them are understanding the heat plate but not all of them, and even if they do get it, if its not already too cramped, it will be in a few days.
Long story short, I caved and gave them back the heat lamp last night. Will probably cut them off this morning and see how the day goes.