condition	mean	min	max
4 h after light	6.1	6.1	6.1
8 h after light	3.45	3.3	3.6
12 h after light	6.3	4.5	8.1
4 h after dark	8.3	3.8	12.8
8 h after dark	3.3	2.8	3.8
12 h after dark	7.0	4.4	9.6