condition	mean	min	max
4 h after light	9.2	9.2	9.2
8 h after light	31.9	30.5	33.3
12 h after light	13.75	10.5	17.0
4 h after dark	5.5	4.0	7.0
8 h after dark	9.7	8.8	10.6
12 h after dark	2.0	1.9	2.1