condition	mean	min	max
4 h after light	7.164336666666666	7.07465	7.30337
8 h after light	7.1348199999999995	7.093889999999999	7.1855199999999995
12 h after light	7.109183333333333	7.06292	7.18359
4 h after dark	7.7162	7.57326	7.9008
8 h after dark	7.867233333333333	7.69154	8.21069
12 h after dark	8.114773333333334	7.82562	8.33784