condition	mean	min	max
4 h after light	7.5334200000000004	7.09523	7.91367
8 h after light	7.550016666666667	7.17457	7.90153
12 h after light	7.706720000000001	7.241510000000001	8.110610000000001
4 h after dark	7.77992	7.470560000000001	8.227089999999999
8 h after dark	7.52264	6.92259	8.12451
12 h after dark	7.49258	6.92245	7.8105199999999995