condition	mean	min	max
4 h after light	1.7	1.7	1.7
8 h after light	3.25	0.7	5.8
12 h after light	1.75	0.5	3.0
4 h after dark	10.0	1.2	18.8
8 h after dark	1.0	0.6	1.4
12 h after dark	0.8	0.7	0.9