condition	mean	min	max
4 h after light	3.7	3.7	3.7
8 h after light	8.75	3.8	13.7
12 h after light	3.4	2.7	4.1
4 h after dark	2.7	2.5	2.9
8 h after dark	5.1	3.5	6.7
12 h after dark	2.9	2.8	3.0