condition	mean	min	max
4 h after light	6.11977	5.87745	6.36209
8 h after light	7.843185	7.51673	8.16964
12 h after light	7.69548	7.26808	8.12288
4 h after dark	8.758135	8.69405	8.82222
8 h after dark	9.398185	8.90528	9.89109
12 h after dark	7.62331	7.32917	7.91745