condition	mean	min	max
4 h after light	15.7	15.7	15.7
8 h after light	16.4	7.4	25.4
12 h after light	15.95	11.2	20.7
4 h after dark	44.5	11.1	77.9
8 h after dark	13.05	11.4	14.7
12 h after dark	18.25	17.7	18.8