Piedras Blancas Light (CA)
Historical Light List Characteristics
| Year | Characteristic | Reference Number |
| Missing light lists prior to 1881 | ||
| 1881 | FFl W 15s. F19, Fl19. | LHB Light List (Dist. 12): NA |
| Missing light lists for 1882-1885 | ||
| 1886-1888 | FFl W 15s. F19.25, Fl19.25. | LHB Light List (Dist. 12): NA |
| Missing light lists for 1889-1891 | ||
| 1892 | FFl W 15s. F19.25, Fl19.25. | LHB Light List (Dist. 12-13): 834 |
| 1893 | LHB Light List (Dist. 12-13): 858 | |
| 1894 | LHB Light List (Dist. 12-13): 875 | |
| 1895 | LHB Light List (Dist. 12-13): 891 | |
| 1896 | LHB Light List (Dist. 12-13): 992 | |
| Missing light lists for 1897-1899 | ||
| 1900 | FFl W 15s. F19.25, Fl19.25. | LHB Light List (Dist. 12-13): 14 |
| Missing light lists for 1901-1905 | ||
| 1906 | FFl W 15s. F19.25, Fl19.25. | LHB Light List (Dist. 12-13): 18 |
| Missing light lists for 1907-1910 | ||
| 1911 | FFl W 15s. F19, Fl19. | USLHS Light List (16th-18th): NA |
| Missing light lists for 1912-1913 | ||
| 1914 | FFl W 15s. F19, Fl19. fl . | USLHS Light List (Pacific): 25 |
| Missing light lists for 1915-1929 | ||
| 1930-1933 | Fl(2) W 15s. W19. fl 0.5, ec 3, fl 0.5, ec 11. | USLHS Light List (Pacific): 70 |
| Missing light lists for 1934-1944 | ||
| 1945 | Fl(2) W 15s. W19. fl 0.8, ec 3, fl 0.8, ec 10.4. | USCG Light List (Pacific): 205 |
| Missing light lists for 1946-1949 | ||
| 1950-1951 | Fl(2) W 15s. W18. fl 1.5, ec 2.5, fl 1.5, ec 9.5. | USCG Light List (Pacific): 205 |
| 1952-1960 | USCG Light List - Vol. I-V: 208 | |
| 1961-1962 | USCG Light List - Vol. III: 208 | |
| 1963 | Fl(2) W 15s. W18. fl 0.4, ec 3.6, fl 0.4, ec 10.6. | |
| 1964-1965 | USCG Light List - Vol. III: 34 | |
| 1966-1972 | Fl(2) W 15s. W18. fl 0.2, ec 3.8, fl 0.2, ec 10.8. | |
| 1973-1974 | Fl(2) W 15s. W25. fl 0.2, ec 3.8, fl 0.2, ec 10.8. | |
| 1975-1984 | Fl W 10s. W25. | USCG Light List - Vol. III: 38 |
| 1985 | USCG Light List - Vol. VI: 38 | |
| 1986 | USCG Light List - Vol. VI: 265 | |
| 1988 | ||
| 1990 | ||
| Missing light lists for 1991-2003 | ||
| 2004 | Fl W 10s. W21. | USCG Light List - Vol. VI: 265 |
Historical Light List Optics and Structures
| Year | Optic | Tower Height | Focal Plane | Description | Reference Number |
| Missing light lists prior to 1881 | |||||
| 1881 | 1st | 90 | NA | White; lantern, red. Conical tower. | LHB Light List (Dist. 12): NA |
| Missing light lists for 1882-1885 | |||||
| 1886 | NA | 90 | NA | White; dome of lantern, black; gallery and balustrade, black. Conical tower. | LHB Light List (Dist. 12): NA |
| 1887-1888 | White; dome of lantern, gallery, and balustrade, black. Conical tower. | ||||
| Missing light lists for 1889-1891 | |||||
| 1892 | 1st | 90 | NA | Conical white tower, about 50 feet in front of dwelling; dome of lantern, balustrade, and gallery black. | LHB Light List (Dist. 12-13): 834 |
| 1893 | 170 | Conical white tower; dome of lantern, balustrade, and gallery black. | LHB Light List (Dist. 12-13): 858 | ||
| 1894 | LHB Light List (Dist. 12-13): 875 | ||||
| 1895 | LHB Light List (Dist. 12-13): 891 | ||||
| 1896 | LHB Light List (Dist. 12-13): 992 | ||||
| Missing light lists for 1897-1899 | |||||
| 1900 | 1st | 90 | 168 | Conical white tower; dome of lantern, balustrade, and gallery black. | LHB Light List (Dist. 12-13): 14 |
| Missing light lists for 1901-1905 | |||||
| 1906 | 1st | 90 | 168 | Conical white tower; dome of lantern, balustrade, and gallery black. | LHB Light List (Dist. 12-13): 18 |
| Missing light lists for 1907-1910 | |||||
| 1911 | 1st | NA | NA | White. Conical tower. | USLHS Light List (16th-18th): NA |
| Missing light lists for 1912-1913 | |||||
| 1914 | NA | 90 | 168 | White; conical tower. | USLHS Light List (Pacific): 25 |
| Missing light lists for 1915-1929 | |||||
| 1930 | 1 iov | 90 | 168 | White conical tower. | USLHS Light List (Pacific): 70 |
| 1931-1933 | 100 | 158 | |||
| Missing light lists for 1934-1944 | |||||
| 1945 | 1 e | 100 | 158 | White conical tower. | USCG Light List (Pacific): 205 |
| Missing light lists for 1946-1949 | |||||
| 1950 | Dl e | 74 | 142 | White conical tower. | USCG Light List (Pacific): 205 |
| 1951 | White conical tower with flat top. | ||||
| 1952-1960 | NA | USCG Light List - Vol. I-V: 208 | |||
| 1961-1963 | USCG Light List - Vol. III: 208 | ||||
| 1964-1974 | USCG Light List - Vol. III: 34 | ||||
| 1975-1984 | USCG Light List - Vol. III: 38 | ||||
| 1985 | USCG Light List - Vol. VI: 38 | ||||
| 1986 | USCG Light List - Vol. VI: 265 | ||||
| 1988 | |||||
| 1990 | |||||
| Missing light lists for 1991-2003 | |||||
| 2004 | NA | NA | 142 | White conical tower with flat top. | USCG Light List - Vol. VI: 265 |
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1875-Present |