condition	mean	min	max
4 h after light	7.246716666666667	7.228860000000001	7.280060000000001
8 h after light	7.87642	7.6287899999999995	8.08676
12 h after light	7.574036666666667	6.99564	8.02594
4 h after dark	7.86043	7.50259	8.18472
8 h after dark	7.482193333333334	7.13467	7.727530000000001
12 h after dark	7.108056666666666	6.89198	7.3311399999999995