condition	mean	min	max
0 h after light	8.636865	8.55905	8.71468
4 h after light	6.690545	5.964	7.41709
8 h after light	5.712125	5.54503	5.87922
4 h after dark	7.501375	6.61219	8.39056
8 h after dark	8.38102	8.07819	8.68385
12 h after dark	7.79912	7.61198	7.98626