condition	mean	min	max
4 h after light	7.58741	7.16012	8.10542
8 h after light	7.249783333333333	6.8156	7.780589999999999
12 h after light	7.649853333333333	7.02843	8.09399
4 h after dark	8.32478	8.03091	8.69834
8 h after dark	7.85259	7.804460000000001	7.921460000000001
12 h after dark	7.727296666666667	7.44871	7.9375