condition mean min max 4 h after light 13.001587 10.19866 15.804514 8 h after light 14.4071985 13.748756 15.065641 12 h after light 13.689245 12.11496 15.26353 4 h after dark 16.900467 16.127113 17.673821 8 h after dark 13.713594 11.733077 15.694111 12 h after dark 13.82943 13.82943 13.82943