condition	mean	min	max
4 h after light	7.48667	7.23402	7.63467
8 h after light	7.554309999999999	7.49697	7.652819999999999
12 h after light	8.681176666666667	8.45812	8.811160000000001
4 h after dark	8.512126666666667	8.40372	8.6574
8 h after dark	8.79327	8.52576	9.05105
12 h after dark	8.90586	8.7866	8.99345