condition	mean	min	max
4 h after light	7.63961	7.404669999999999	7.88475
8 h after light	7.8591033333333336	7.62022	8.244760000000001
12 h after light	7.738363333333334	7.60946	7.919160000000001
4 h after dark	7.377879999999999	7.2171199999999995	7.6828199999999995
8 h after dark	7.562626666666667	7.39958	7.76617
12 h after dark	7.45547	7.30112	7.57521