condition	mean	min	max
4 h after light	7.52916	7.429460000000001	7.72204
8 h after light	7.591873333333333	7.5263800000000005	7.6853
12 h after light	7.78729	7.6628	8.00324
4 h after dark	7.65443	7.540960000000001	7.848039999999999
8 h after dark	7.661356666666667	7.521610000000001	7.836360000000001
12 h after dark	7.43795	7.329219999999999	7.63165