condition	mean	min	max
4 h after light	3.4	3.4	3.4
8 h after light	7.6	6.7	8.5
12 h after light	2.9	1.0	4.8
4 h after dark	1.15	0.9	1.4
8 h after dark	1.65	1.2	2.1
12 h after dark	2.4	1.2	3.6