condition	mean	min	max
4 h after light	4.5	4.5	4.5
8 h after light	55.45	45.9	65.0
12 h after light	16.75	15.6	17.9
4 h after dark	38.55	25.9	51.2
8 h after dark	66.6	65.6	67.6
12 h after dark	21.25	18.4	24.1