condition	mean	min	max
4 h after light	8.5	8.5	8.5
8 h after light	4.9	2.1	7.7
12 h after light	18.45	12.4	24.5
4 h after dark	8.45	7.5	9.4
8 h after dark	7.25	5.7	8.8
12 h after dark	9.3	8.5	10.1