condition	mean	min	max
4 h after light	10.8	10.8	10.8
8 h after light	7.1	5.6	8.6
12 h after light	9.05	4.8	13.3
4 h after dark	9.7	6.5	12.9
8 h after dark	15.4	9.7	21.1
12 h after dark	8.3	6.4	10.2