condition	mean	min	max
4 h after light	6.413925	6.37854	6.44931
8 h after light	6.366885	5.86111	6.87266
12 h after light	7.289975	7.18152	7.39843
4 h after dark	7.902103333333333	7.40154	8.42827
8 h after dark	7.67464	7.45802	7.88314
12 h after dark	8.576976666666667	8.35279	8.74937