condition	mean	min	max
4 h after light	6.6149466666666665	6.47193	6.83484
8 h after light	6.61662	6.488569999999999	6.810160000000001
12 h after light	6.569416666666666	6.501519999999999	6.639460000000001
4 h after dark	6.65886	6.6141	6.68843
8 h after dark	6.7716	6.63085	6.9447
12 h after dark	6.792813333333333	6.64825	6.95441