condition	mean	min	max
4 h after light	7.33136	7.0949	7.56782
8 h after light	8.314475	7.90745	8.7215
12 h after light	12.40535	12.343	12.4677
4 h after dark	17.32515	16.8371	17.8132
8 h after dark	15.15545	14.9297	15.3812
12 h after dark	11.3157	10.6501	11.9813