condition	mean	min	max
4 h after light	19.4	19.4	19.4
8 h after light	11.85	1.2	22.5
12 h after light	4.45	3.0	5.9
4 h after dark	2.75	2.2	3.3
8 h after dark	15.6	2.5	28.7
12 h after dark	7.9	1.9	13.9