I thought I would post a picture of what I did for my nesting boxes. My boxes aren't located in a very dark area so I added these curtains to darken them so the chickens would feel more secure using them. (Oh, pardon the poo. I didn't make my top sloped enough so they roost up there. ) Notice that they don't go down all the way to the bottom of the box. Only 2/3rds down. Also notice the first two boxes where 2/3rds of the strips are folded up. This helps them get used to them and see in. After they start using them well, then you can put the strips back down. I keep a few up because only 5 of my girls are laying right now. 9 to go. Hope this is helpful to somebody.