condition	mean	min	max
4 h after light	6.8	6.8	6.8
8 h after light	13.950000000000001	8.3	19.6
12 h after light	14.350000000000001	7.9	20.8
4 h after dark	1.1	1.0	1.2
8 h after dark	5.3	1.9	8.7
12 h after dark	18.55	15.5	21.6