condition mean min max 4 h after light 7.279233333333334 6.66418 8.163160000000001 8 h after light 10.08297 9.532680000000001 10.54341 12 h after light 10.094513333333333 9.894110000000001 10.21836 4 h after dark 8.27338 7.804819999999999 8.82195 8 h after dark 7.8994800000000005 7.4615800000000005 8.7749 12 h after dark 6.70535 6.28543 7.15257