condition	mean	min	max
4 h after light	8.932435	8.58249	9.28238
8 h after light	8.646025	8.46842	8.82363
12 h after light	4.761815	4.22897	5.29466
4 h after dark	4.731685	4.10575	5.35762
8 h after dark	5.72974	5.02581	6.43367
12 h after dark	6.989115	5.87566	8.10257