Piedras Blancas (California)
Historical Light List Characteristics
| 1878 | FFl W 15s. F19, Fl19. | LHB Light List (All Coasts): 453 |
| 1879 | LHB Light List (All Coasts): 472 | |
| 1881 | LHB Light List (Dist. 12): N/A | |
| 1886 | FFl W 15s. F191/4, Fl191/4. | LHB Light List (All Coasts): 604 |
| 1887 | LHB Light List (Dist. 12): N/A | |
| 1888 | LHB Light List (All Coasts): 643 | |
| 1892 | 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 | |
| 1900 | LHB Light List (Dist. 12-13): 14 | |
| 1906 | LHB Light List (Dist. 12-13): 18 | |
| 1911 | FFl W 15s. F19, Fl19. | USLHS Light List (16th-18th): N/A |
| 1914 | FFl W 15s. F19, Fl19. fl 1.1. | USLHS Light List (Pacific): 25 |
| 1930-1933 | Fl(2) W 15s. W19. fl 0.5, ec 3, fl 0.5, ec 11. | USLHS Light List (Pacific): 70 |
| 1945 | Fl(2) W 15s. W19. fl 0.8, ec 3, fl 0.8, ec 10.4. | USCG Light List (Pacific): 205 |
| 1950-1951 | Fl(2) W 15s. W18. fl 1.5, ec 2.5, fl 1.5, ec 9.5. | |
| 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 | ||
| 2004 | Fl W 10s. W21. |
Historical Light List Optics and Structures
| 1878 | 1st | 90 | 170 | Light on white-painted brick tower, conical in form, with iron parapet and a lantern. Lantern and dome painted red. | LHB Light List (All Coasts): 453 |
| 1879 | LHB Light List (All Coasts): 472 | ||||
| 1881 | N/A | White; lantern, red. Conical tower. | LHB Light List (Dist. 12): N/A | ||
| 1886 | 170 | Conical white tower; dome of lantern, red; balustrade and gallery, black. Light-buff dwelling, about 50 feet in rear. Out-houses and fences, white. | LHB Light List (All Coasts): 604 | ||
| 1887 | N/A | N/A | White; dome of lantern, gallery, and balustrade, black. Conical tower. | LHB Light List (Dist. 12): N/A | |
| 1888 | 1st | 170 | Conical white tower; dome of lantern, balustrade and gallery, black. Light-buff dwelling, about 50 feet in rear of tower. Out-houses and fences, white. | LHB Light List (All Coasts): 643 | |
| 1892 | N/A | 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 | ||||
| 1900 | 168 | LHB Light List (Dist. 12-13): 14 | |||
| 1906 | LHB Light List (Dist. 12-13): 18 | ||||
| 1911 | N/A | N/A | White. Conical tower. | USLHS Light List (16th-18th): N/A | |
| 1914 | N/A | 90 | 168 | White; conical tower. | USLHS Light List (Pacific): 25 |
| 1930 | 1 iov | White conical tower. | USLHS Light List (Pacific): 70 | ||
| 1931-1933 | 100 | 158 | |||
| 1945 | 1 e | USCG Light List (Pacific): 205 | |||
| 1950 | Dl e | 74 | 142 | ||
| 1951 | White conical tower with flat top. | ||||
| 1952-1960 | N/A | 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 | |||||
| 2004 | N/A |
Historical Light List Audible Fog Signals
| 1878 | None | None | LHB Light List (All Coasts): 453 |
| 1879 | LHB Light List (All Coasts): 472 | ||
| 1881 | LHB Light List (Dist. 12): N/A | ||
| 1886 | LHB Light List (All Coasts): 604 | ||
| 1887 | LHB Light List (Dist. 12): N/A | ||
| 1888 | LHB Light List (All Coasts): 643 | ||
| 1892 | 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 | ||
| 1900 | LHB Light List (Dist. 12-13): 14 | ||
| 1906 | LHB Light List (Dist. 12-13): 18 | ||
| 1911 | USLHS Light List (16th-18th): N/A | ||
| 1914 | 1st-cl. air siren: Blast 2 sec. Silent 20 sec. | USLHS Light List (Pacific): 25 | |
| 1930-1933 | SIREN, 1st-cl. air: Blast 3 sec., silent 17 sec. | USLHS Light List (Pacific): 70 | |
| 1945 | DIAPHONE, air; blast 3 sec., silent 27 sec. | Siren if diaphone is disabled. | USCG Light List (Pacific): 205 |
| 1950-1951 | DIAPHONE, air, two-tone; blast 3 sec., silent 27 sec. | None | |
| 1952-1959 | DIAPHONE, two-tone; 1 blast ev 30s (3sbl). | USCG Light List - Vol. I-V: 208 | |
| 1960 | HORN, diaphragm; 1 blast ev 30s (3sbl). | ||
| 1961-1963 | USCG Light List - Vol. III: 208 | ||
| 1964-1972 | USCG Light List - Vol. III: 34 | ||
| 1973-1974 | HORN, 1 blast ev 30s (3sbl). | ||
| 1975-1984 | None | USCG Light List - Vol. III: 38 | |
| 1985 | USCG Light List - Vol. VI: 38 | ||
| 1986 | USCG Light List - Vol. VI: 265 | ||
| 1988 | |||
| 1990 | |||
| 2004 |
Historical Light List Other Signals
| 1930-1933 | None | USLHS Light List (Pacific): 70 |
| 1945 | USCG Light List (Pacific): 205 | |
| 1950-1951 | ||
| 1952-1960 | USCG Light List - Vol. I-V: 208 | |
| 1961-1963 | USCG Light List - Vol. III: 208 | |
| 1964-1974 | USCG Light List - Vol. III: 34 | |
| 1975-1976 | USCG Light List - Vol. III: 38 | |
| 1977 | RBN: 296 kHz (  ). |
|
| 1978 | RBN: 296 kHz ( ). Antenna on light tower. |
|
| 1979-1982 | RBN: 296 kHz PB (). Antenna on light tower. |
|
| 1983-1984 | RBN: 317 kHz PB (). Antenna on light tower. |
|
| 1985 | USCG Light List - Vol. VI: 38 | |
| 1986 | USCG Light List - Vol. VI: 265 | |
| 1988 | ||
| 1990 | ||
| 2004 | None |
 |
1875 - Present |