condition	mean	min	max
4 h after light	7.894336666666667	7.783339999999999	7.957660000000001
8 h after light	7.96636	7.81256	8.07437
12 h after light	8.083093333333332	7.908239999999999	8.30919
4 h after dark	8.049493333333334	7.8338399999999995	8.349260000000001
8 h after dark	8.03592	7.77637	8.41393
12 h after dark	7.873740000000001	7.71535	7.997260000000001