condition	mean	min	max
4 h after light	6.830926666666667	6.5160800000000005	7.253189999999999
8 h after light	6.977843333333333	6.746860000000001	7.4393199999999995
12 h after light	7.309810000000001	7.217960000000001	7.4246300000000005
4 h after dark	7.054473333333333	6.81047	7.382210000000001
8 h after dark	6.8706033333333325	6.757569999999999	6.976719999999999
12 h after dark	6.829423333333333	6.667839999999999	6.937939999999999