condition mean min max 4 h after light 5.75922 4.12701 7.23346 8 h after light 8.15989 4.12771 11.1476 12 h after light 8.982783333333334 6.1995 12.4718 4 h after dark 16.931433333333334 15.0949 20.0615 8 h after dark 16.048333333333332 14.1551 18.9997 12 h after dark 11.5773 10.32 12.2478