condition	mean	min	max
4 h after light	8.57851	8.4489	8.7176
8 h after light	8.59672	8.54059	8.6502
12 h after light	8.483136666666667	8.36674	8.55311
4 h after dark	8.508189999999999	8.43196	8.62337
8 h after dark	8.482603333333333	8.31846	8.596919999999999
12 h after dark	8.60415	8.55579	8.69161