condition	mean	min	max
4 h after light	6.808806666666667	6.65753	6.94148
8 h after light	6.831230000000001	6.66563	6.9315
12 h after light	6.527089999999999	6.34854	6.672789999999999
4 h after dark	6.80948	6.73525	6.8792
8 h after dark	6.7095433333333325	6.60779	6.779039999999999
12 h after dark	6.811446666666667	6.732239999999999	6.909330000000001