condition	mean	min	max
4 h after light	17.4	17.4	17.4
8 h after light	14.15	13.9	14.4
12 h after light	18.5	8.5	28.5
4 h after dark	3.85	1.3	6.4
8 h after dark	10.5	5.9	15.1
12 h after dark	22.15	21.3	23.0