condition	mean	min	max
4 h after light	6.9716933333333335	6.71806	7.1291199999999995
8 h after light	6.8804799999999995	6.55797	7.170489999999999
12 h after light	7.065023333333333	6.81323	7.20067
4 h after dark	7.31671	7.05998	7.46055
8 h after dark	7.508343333333333	7.08834	7.74711
12 h after dark	7.894466666666666	7.678439999999999	8.01697