condition	mean	min	max
4 h after light	3.9	3.9	3.9
8 h after light	5.75	5.2	6.3
12 h after light	7.4	7.2	7.6
4 h after dark	16.2	11.4	21.0
8 h after dark	9.95	7.2	12.7
12 h after dark	10.75	10.4	11.1