condition	mean	min	max
4 h after light	8.26313	7.93514	8.59112
8 h after light	12.0167	11.9339	12.0995
12 h after light	18.51195	17.8082	19.2157
4 h after dark	17.129466666666666	16.0993	18.6137
8 h after dark	14.026766666666667	13.1475	15.5676
12 h after dark	14.3748	12.1081	18.8655