condition	mean	min	max
4 h after light	5.5	5.5	5.5
8 h after light	13.45	7.4	19.5
12 h after light	7.55	2.1	13.0
4 h after dark	5.25	2.0	8.5
8 h after dark	10.75	2.0	19.5
12 h after dark	3.55	2.6	4.5