condition	mean	min	max
4 h after light	7.959756666666667	7.70005	8.34136
8 h after light	7.612483333333333	7.247539999999999	7.89712
12 h after light	7.807340000000001	7.696060000000001	8.01848
4 h after dark	7.480766666666668	7.270630000000001	7.591010000000001
8 h after dark	7.668753333333334	7.58875	7.748410000000001
12 h after dark	7.53584	7.29473	7.99223