condition	mean	min	max
4 h after light	7.83294	7.608789999999999	8.24368
8 h after light	7.871556666666667	7.416010000000001	8.30265
12 h after light	7.551326666666666	7.18284	7.8167
4 h after dark	7.740036666666667	7.34915	8.11353
8 h after dark	7.609583333333333	7.3887100000000006	7.84674
12 h after dark	7.376900000000001	7.258430000000001	7.530360000000001