condition	mean	min	max
4 h after light	4.5	4.5	4.5
8 h after light	9.75	3.6	15.9
12 h after light	17.55	12.5	22.6
4 h after dark	24.25	5.2	43.3
8 h after dark	18.4	15.1	21.7
12 h after dark	21.3	5.6	37.0