condition	mean	min	max
4 h after light	7.88149	7.8601600000000005	7.89734
8 h after light	7.6760866666666665	7.5583100000000005	7.897189999999999
12 h after light	7.733496666666667	7.652410000000001	7.83322
4 h after dark	7.83347	7.550839999999999	8.046610000000001
8 h after dark	7.895913333333334	7.594710000000001	8.13924
12 h after dark	7.934946666666667	7.8362	8.026110000000001