condition	mean	min	max
4 h after light	6.7	6.7	6.7
8 h after light	2.3	2.0	2.6
12 h after light	10.3	5.2	15.4
4 h after dark	10.15	7.0	13.3
8 h after dark	5.6	4.3	6.9
12 h after dark	8.55	4.2	12.9