condition	mean	min	max
4 h after light	169.5	169.5	169.5
8 h after light	121.3	66.4	176.2
12 h after light	56.9	40.5	73.3
4 h after dark	3.55	2.9	4.2
8 h after dark	13.95	11.6	16.3
12 h after dark	22.85	20.1	25.6