condition	mean	min	max
4 h after light	7.319213333333333	7.20175	7.404039999999999
8 h after light	7.493850000000001	7.431010000000001	7.567830000000001
12 h after light	7.477373333333333	7.4079	7.5277199999999995
4 h after dark	7.38449	7.262560000000001	7.460210000000001
8 h after dark	7.51486	7.423039999999999	7.58674
12 h after dark	7.4844333333333335	7.3529	7.56695