condition	mean	min	max
4 h after light	0.9	0.9	0.9
8 h after light	2.6	2.0	3.2
12 h after light	6.1	3.6	8.6
4 h after dark	13.9	4.5	23.3
8 h after dark	16.0	2.5	29.5
12 h after dark	15.15	3.3	27.0