condition	mean	min	max
4 h after light	9.0	9.0	9.0
8 h after light	16.05	15.6	16.5
12 h after light	23.65	11.3	36.0
4 h after dark	65.75	57.9	73.6
8 h after dark	38.1	15.7	60.5
12 h after dark	15.35	15.2	15.5