condition	mean	min	max
4 h after light	57.6	57.6	57.6
8 h after light	68.0	60.9	75.1
12 h after light	67.75	66.1	69.4
4 h after dark	36.95	19.9	54.0
8 h after dark	13.05	10.5	15.6
12 h after dark	19.65	17.8	21.5