condition mean min max 3 h after light 8.804593333333333 7.11036 10.0238 6 h after light 11.15383 8.39049 12.7358 9 h after light 13.3589 11.4016 15.161 12 h after light 14.373125 11.283 15.8017 3 h after dark 19.13126666666667 17.0939 20.6443 6 h after dark 14.613333333333333 12.9268 16.3189 9 h after dark 10.83908 9.77184 12.4082 12 h after dark 6.67515 5.7372 7.6131