condition	mean	min	max
0 h after light	20.71455	20.7019	20.7272
4 h after light	8.489905	8.10073	8.87908
8 h after light	6.401025	6.33606	6.46599
4 h after dark	9.924444999999999	9.10859	10.7403
8 h after dark	10.68505	9.6245	11.7456
12 h after dark	15.8412	12.0397	19.6427