condition	mean	min	max
4 h after light	8.076313333333333	7.921	8.21623
8 h after light	8.027703333333333	7.946289999999999	8.08493
12 h after light	8.110660000000001	7.99568	8.248510000000001
4 h after dark	8.36355	8.1946	8.65568
8 h after dark	8.55902	8.31155	8.81925
12 h after dark	8.826406666666667	8.57361	8.96134