condition	mean	min	max
4 h after light	7.9457033333333325	7.84592	8.1147
8 h after light	7.866580000000001	7.51907	8.30226
12 h after light	8.028369999999999	7.7986	8.43592
4 h after dark	8.092996666666668	7.9883	8.290510000000001
8 h after dark	8.068106666666667	7.89233	8.38757
12 h after dark	8.431123333333334	8.3593	8.5616