condition	mean	min	max
4 h after light	7.8481733333333334	7.842230000000001	7.85819
8 h after light	8.04581	7.86309	8.14936
12 h after light	7.940156666666666	7.851539999999999	8.01607
4 h after dark	8.235916666666666	7.862439999999999	8.48095
8 h after dark	8.35994	8.33344	8.38182
12 h after dark	8.1303	7.77577	8.321769999999999