We get what you're saying. They will be fine without the light. They won't starve. Like I said, a chick under a broody wouldn't get up in the middle of the night for a snack. If the light is off the chicks will sleep, not eatp. They're old enough it's fine. Sounds like you'll be paranoid anyway...
I do it the same way you do and I'll say that if they're hungry enough they'll find the food but chances are they will just sleep through the night. Some mornings when I check on the babes their feeder is knocked over like it is during the day so I know they've gotten up and eaten on their own...
My six week olds are off the lamp and only getting natural sunlight. They sleep all night and don't eat in the middle of the night. They certainly won't die but id make sure they had plenty of food first thing in the morning when their light comes back on. They'll be fine with the light off and...