condition	mean	min	max
0 h after light	9.690025	9.33435	10.0457
4 h after light	8.91459	8.03842	9.79076
8 h after light	7.958325	7.70646	8.21019
4 h after dark	7.164485	6.64891	7.68006
8 h after dark	6.69622	6.52413	6.86831
12 h after dark	8.15768	7.92397	8.39139