condition	mean	min	max
4 h after light	6.8	6.8	6.8
8 h after light	14.5	8.4	20.6
12 h after light	12.0	7.9	16.1
4 h after dark	3.65	2.5	4.8
8 h after dark	7.4	7.4	7.4
12 h after dark	11.3	5.3	17.3