condition	mean	min	max
4 h after light	15.2	15.2	15.2
8 h after light	5.15	3.1	7.2
12 h after light	4.6	1.1	8.1
4 h after dark	8.9	1.1	16.7
8 h after dark	2.0	1.7	2.3
12 h after dark	2.75	1.8	3.7