condition	mean	min	max
4 h after light	5.1	5.1	5.1
8 h after light	5.6	4.1	7.1
12 h after light	10.25	8.4	12.1
4 h after dark	22.1	20.8	23.4
8 h after dark	13.15	12.0	14.3
12 h after dark	19.25	13.3	25.2