Point Arguello (California)
Historical Light List Characteristics
| 1906 | F W. W151/4. | LHB Light List (Dist. 12-13): 16 |
| 1911 | F W. W15. | USLHS Light List (16th-18th): N/A |
| 1914 | Fl(2) W 7.5s. W16. fl 0.2, ec 2, fl 0.2, ec 5.1. | USLHS Light List (Pacific): 23 |
| 1930-1933 | Fl(2) W 10s. W16. fl 0.2, ec 2.3, fl 0.2, ec 7.3. | USLHS Light List (Pacific): 65 |
| 1945 | Fl(2) W 60s. W17. fl 2, ec 6, fl 2, ec 50. | USCG Light List (Pacific): 188 |
| 1950-1951 | ||
| 1952-1960 | USCG Light List - Vol. I-V: 25 | |
| 1961-1962 | USCG Light List - Vol. III: 25 | |
| 1963-1966 | Fl(2) W 30s. W17. fl 1, ec 3, fl 1, ec 25. | |
| 1967 | Fl(2) W 30s. W17. fl 0.4, ec 3.6, fl 0.4, ec 25.6. | |
| 1968-1972 | Fl(2) W 30s. W17. fl 0.2, ec 3.8, fl 0.2, ec 25.8. | |
| 1973 | Fl(2) W 30s. W26. fl 0.2, ec 3.8, fl 0.2, ec 25.8. | |
| 1974 | Fl(2) W 30s. W24. fl 0.2, ec 3.8, fl 0.2, ec 25.8. | |
| 1975-1980 | USCG Light List - Vol. III: 30 | |
| 1981-1984 | Fl W 15s. W24. | |
| 1985 | USCG Light List - Vol. VI: 30 | |
| 1986 | USCG Light List - Vol. VI: 210 | |
| 1988 | ||
| 1990 | ||
| 2004 | Fl W 15s. W9. |
Historical Light List Optics and Structures
| 1906 | 4th | 273/4 | 91 | Square tower, with black lantern, rising from fog signal building. | LHB Light List (Dist. 12-13): 16 |
| 1911 | N/A | N/A | White. Square, wooden tower rising from fog signal building. | USLHS Light List (16th-18th): N/A | |
| 1914 | N/A | 28 | 100 | Gray; square tower. | USLHS Light List (Pacific): 23 |
| 1930-1933 | 4 ei | White square tower. | USLHS Light List (Pacific): 65 | ||
| 1945 | Dl e | 48 | 124 | White skeleton tower. | USCG Light List (Pacific): 188 |
| 1950-1951 | |||||
| 1952-1960 | N/A | USCG Light List - Vol. I-V: 25 | |||
| 1961-1967 | USCG Light List - Vol. III: 25 | ||||
| 1968-1974 | White rectangular tower. | ||||
| 1975-1980 | USCG Light List - Vol. III: 30 | ||||
| 1981-1984 | 120 | ||||
| 1985 | USCG Light List - Vol. VI: 30 | ||||
| 1986 | On single pole. | USCG Light List - Vol. VI: 210 | |||
| 1988 | |||||
| 1990 | |||||
| 2004 | 20 | 100 | On single post. |
Historical Light List Audible Fog Signals
| 1906 | 12-inch compressed-air whistle; blasts 2 sec., silent intervals 28 sec. | None | LHB Light List (Dist. 12-13): 16 |
| 1911 | None | USLHS Light List (16th-18th): N/A | |
| 1914 | 1st-cl. air siren: Blast 2 sec. Silent 28 sec. | USLHS Light List (Pacific): 23 | |
| 1930-1933 | SIREN, 1st-cl. air: Blast 2 sec., silent 28 sec. | USLHS Light List (Pacific): 65 | |
| 1945 | DIAPHONE, two-tone, air; blast every 20 sec., blast 2 sec., silent 28 sec. | USCG Light List (Pacific): 188 | |
| 1950-1951 | |||
| 1952-1953 | DIAPHONE, two-tone; when operating, is synchronized with radiobeacon ev 3 minutes for distance finding. | USCG Light List - Vol. I-V: 25 | |
| 1954-1960 | DIAPHONE, two-tone; when operating, is synchronized with radiobeacon ev 3 minutes for distance finding. | ||
| 1961 | USCG Light List - Vol. III: 25 | ||
| 1962 | DIAPHONE, two-tone; 1 blast ev 20s (2sbl). | ||
| 1963-1966 | HORN, diaphragm; 1 blast ev 20s (2sbl). | ||
| 1967-1970 | HORN, diaphragm; 1 blast ev 30s (3sbl). | ||
| 1971-1972 | HORN, diaphragm; 2 blasts ev 20s (2sbl-2ssi-2sbl-14ssi). | ||
| 1973-1974 | HORN, 2 blasts ev 20s (2sbl-2ssi-2sbl-14ssi). | ||
| 1975 | USCG Light List - Vol. III: 30 | ||
| 1976-1980 | HORN: 2 blasts ev 20s (2sbl-2ssi-2sbl-14ssi). | ||
| 1981 | HORN: 2 blasts ev 20s (2s bl-2s si-2s bl-14s si). | ||
| 1982 | HORN: 2 blasts ev 20s (2s bl-2s si-2s bl-14s si). Located 316 yards 270° from Light Tower. | ||
| 1983-1984 | HORN: 2 blasts ev 20s (2s bl-2s si-2s bl-14s si). Located 316 yards 270° from light tower. | ||
| 1985 | USCG Light List - Vol. VI: 30 | ||
| 1986 | HORN: 2 blasts ev 20s (2s bl-2s si-2s bl-14s si). Located 316 yards 270° from light tower. | USCG Light List - Vol. VI: 210 | |
| 1988 | |||
| 1990 | |||
| 2004 | None |
Historical Light List Other Signals
| 1930-1933 | RADIOBEACON: Transmits gps. of 3 dashes. | USLHS Light List (Pacific): 65 |
| 1945 | RADIOBEACON: Transmits on 302 kc, groups of 3 dashes ( ). Antenna 100 feet 34° from lighthouse. DISTANCE-FINDING STATION. |
USCG Light List (Pacific): 188 |
| 1950-1951 | RADIOBEACON: Transmits on 302 kc, groups of 3 dashes (). Antenna 100 feet 34° from lighthouse. DISTANCE-FINDING STATION. |
|
| 1952-1960 | RADIOBEACON: 302 kc (Code: ). Antenna 100 feet 034° from light tower. |
USCG Light List - Vol. I-V: 25 |
| 1961 | USCG Light List - Vol. III: 25 | |
| 1962-1964 | RADIOBEACON: Antenna 100 feet 034° from light tower. | |
| 1965-1974 | RADIOBEACON: Antenna 430 yards 070° 18' from light tower. | |
| 1975-1978 | RBN: 302 kHz () III, VI. Antenna 430 yards 070° 18' from light tower. |
USCG Light List - Vol. III: 30 |
| 1979-1981 | RBN: 302 kHz O () III, VI. Antenna 430 yards 070° 18' from light tower. |
|
| 1982-1984 | RBN: 302 kHz O () III, VI. Antenna 283 yards 060° from light tower. |
|
| 1985 | USCG Light List - Vol. VI: 30 | |
| 1986 | USCG Light List - Vol. VI: 210 | |
| 1988 | ||
| 1990 | ||
| 2004 | None |
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1901 - Present |