condition	mean	min	max
4 h after light	7.88397	7.401839999999999	8.40611
8 h after light	7.80539	7.4633899999999995	8.17855
12 h after light	7.547493333333334	7.39415	7.64836
4 h after dark	7.5829699999999995	7.259189999999999	8.038089999999999
8 h after dark	7.55834	7.262060000000001	8.0169
12 h after dark	7.215483333333333	6.89112	7.670260000000001