condition mean min max 4 h after light 8.109920500000001 7.667527 8.552314 8 h after light 8.0973005 7.792676 8.401925 12 h after light 8.7381095 8.552314 8.923905 4 h after dark 8.0235085 7.792676 8.254341 8 h after dark 7.773521499999999 6.665337 8.881706 12 h after dark 7.671887 7.671887 7.671887