condition	mean	min	max
4 h after light	6.2	6.2	6.2
8 h after light	4.3	3.1	5.5
12 h after light	4.9	4.3	5.5
4 h after dark	2.65	1.9	3.4
8 h after dark	2.7	2.6	2.8
12 h after dark	4.9	4.9	4.9