condition	mean	min	max
4 h after light	2.7	2.7	2.7
8 h after light	1.2	0.9	1.5
12 h after light	16.7	1.5	31.9
4 h after dark	12.2	2.4	22.0
8 h after dark	6.2	1.6	10.8
12 h after dark	3.9	2.2	5.6