condition	mean	min	max
4 h after light	7.490485	6.82219	8.15878
8 h after light	6.837485	6.49794	7.17703
12 h after light	6.4586500000000004	5.77407	7.14323
4 h after dark	8.5589	8.23402	9.0317
8 h after dark	7.58549	7.0032	8.09943
12 h after dark	7.767390000000001	7.02701	8.236