condition	mean	min	max
4 h after light	8.666950000000002	8.590710000000001	8.759210000000001
8 h after light	8.691	8.47495	8.85074
12 h after light	8.496783333333333	8.4278	8.55232
4 h after dark	8.580263333333333	8.33506	8.75273
8 h after dark	8.496396666666666	8.212769999999999	8.665980000000001
12 h after dark	8.310743333333335	8.285160000000001	8.355260000000001