condition	mean	min	max
4 h after light	7.654813333333333	7.599810000000001	7.75338
8 h after light	7.455903333333333	7.40988	7.511539999999999
12 h after light	7.678613333333334	7.60642	7.7291300000000005
4 h after dark	8.304223333333333	8.28914	8.33357
8 h after dark	8.356283333333332	8.128789999999999	8.50437
12 h after dark	8.826500000000001	8.745510000000001	8.95266