condition	mean	min	max
4 h after light	6.750043333333333	6.575589999999999	7.03495
8 h after light	6.70679	6.52504	6.9603600000000005
12 h after light	6.622106666666666	6.40485	7.012110000000001
4 h after dark	6.744023333333334	6.6862	6.792660000000001
8 h after dark	6.73103	6.4082099999999995	7.04327
12 h after dark	6.69058	6.52752	7.00644