condition	mean	min	max
4 h after light	3.6	3.6	3.6
8 h after light	5.9	5.2	6.6
12 h after light	2.8	1.6	4.0
4 h after dark	7.2	5.9	8.5
8 h after dark	12.0	5.1	18.9
12 h after dark	4.55	4.3	4.8