condition	mean	min	max
4 h after light	2.5	2.5	2.5
8 h after light	4.6	2.8	6.4
12 h after light	18.1	7.0	29.2
4 h after dark	3.0	2.4	3.6
8 h after dark	16.3	5.2	27.4
12 h after dark	3.4	2.3	4.5