condition	mean	min	max
4 h after light	2.0	2.0	2.0
8 h after light	10.2	9.8	10.6
12 h after light	9.0	4.5	13.5
4 h after dark	2.15	1.9	2.4
8 h after dark	2.8	2.6	3.0
12 h after dark	9.8	3.3	16.3