condition	mean	min	max
4 h after light	3.5	3.5	3.5
8 h after light	5.7	4.2	7.2
12 h after light	3.25	2.6	3.9
4 h after dark	3.75	2.6	4.9
8 h after dark	3.8	3.0	4.6
12 h after dark	4.25	4.0	4.5