condition	mean	min	max
4 h after light	8.435126666666667	8.36778	8.51184
8 h after light	8.345613333333334	8.257760000000001	8.4821
12 h after light	8.24223	8.208	8.266869999999999
4 h after dark	8.368166666666667	8.25796	8.514489999999999
8 h after dark	8.391793333333334	8.30043	8.457360000000001
12 h after dark	8.51851	8.39332	8.59488