What happens is breeders have stopped breeding for personality traits. There are a few Ameraucana breeders that talk about this. You can breed for docileness (cuddly) chickens or you can breed away from it. This happens in all breeds depending on what a line is focused on.
Mine have flood lights all the time. The coop is dark tho. The flood lights have saved their a**es a few times. I leave them on because I have some that roost in the trees and if they get targeted by a coon they need to be able to see to evade untill I can get out there.