condition	mean	min	max
4 h after light	3.5	3.5	3.5
8 h after light	6.95	5.6	8.3
12 h after light	3.25	2.8	3.7
4 h after dark	4.0	3.9	4.1
8 h after dark	3.75	3.0	4.5
12 h after dark	4.3	3.8	4.8