condition	mean	min	max
4 h after light	0.9	0.9	0.9
8 h after light	3.2	2.6	3.8
12 h after light	2.25	0.9	3.6
4 h after dark	6.1	4.7	7.5
8 h after dark	19.7	16.0	23.4
12 h after dark	12.7	3.0	22.4