condition	mean	min	max
4 h after light	9.8	9.8	9.8
8 h after light	10.8	9.6	12.0
12 h after light	14.55	13.2	15.9
4 h after dark	12.8	9.9	15.7
8 h after dark	15.35	6.8	23.9
12 h after dark	8.1	7.7	8.5