condition	mean	min	max
4 h after light	1.3	1.3	1.3
8 h after light	2.1	2.0	2.2
12 h after light	2.45	2.2	2.7
4 h after dark	1.55	1.3	1.8
8 h after dark	2.5	2.5	2.5
12 h after dark	3.2	1.9	4.5