condition mean min max 4 h after light 6.290436333333334 3.8645480000000005 9.210249000000001 8 h after light 15.574006666666666 10.97825 18.547639999999998 12 h after light 17.022756666666666 13.02955 22.00721 16 h after light 14.270499999999998 12.94722 16.6514 4 h after dark 8.560950666666667 5.948102 12.740960000000001 8 h after dark 11.239598666666666 9.643236 13.70385