condition	mean	min	max
4 h after light	6.50708	6.4196	6.58283
8 h after light	6.621643333333333	6.23986	7.001580000000001
12 h after light	6.42741	6.297999999999999	6.59143
4 h after dark	6.696883333333333	6.44674	7.00247
8 h after dark	6.5862300000000005	6.07955	7.026910000000001
12 h after dark	6.611986666666667	6.3894400000000005	6.95222