condition	mean	min	max
4 h after light	1.8	1.8	1.8
8 h after light	18.05	4.1	32.0
12 h after light	5.1	1.6	8.6
4 h after dark	2.6	2.2	3.0
8 h after dark	3.4	3.0	3.8
12 h after dark	1.7	1.7	1.7