condition	mean	min	max
4 h after light	7.71289	7.51625	7.85217
8 h after light	7.87632	7.791710000000001	8.000919999999999
12 h after light	7.707953333333333	7.66788	7.73205
4 h after dark	7.9891033333333334	7.88996	8.10465
8 h after dark	7.97981	7.886369999999999	8.04744
12 h after dark	7.74726	7.704389999999999	7.80859