Dave O.
Yelp
Another beautiful Florida Lighthouse with lots of history we are very fortunate to have so many in our state, by simply visiting and taking the tour you are contributing to the preservation of this historic landmark to ensure it is around for generations to come. This is an amazing piece of history I added in some interesting facts so you will look like a scholar when you take the tour.
Cost - $60,859.00 in 1860 or $1,738,828.00 in today's dollars the cost was almost twice as much as budgeted.
First Lit Location Construction - July 10, 1860
Locations - Latitude 26° 56.9' 37" North, Longitude 80° 4.9' 17" West
Construction - Brick, double masonry walls, outer conical, tapering from 31.5" (8 bricks thick) at ground to 18 inches (3 bricks thick) at base of lantern. Inner wall cylindrical and 2 bricks thick throughout. Circumference at base is about 65' and at top about 43'.
Height - 156' - 108' tower on a 48' hill, natural parabolic dune top with a layer of shell.
Focal Plane - 146'. This is the level at which the beam of light is emitted.
Steps - 105 cast iron stairs spiraling counterclockwise around a central iron column with three landings.
Optics - First order Fresnel lens, manufactured in Paris by Henry-Lepaute and reputed to be the oldest existing first order Fresnel lens in Florida. Of the six regular orders of lenses, the first is the most powerful.
Lamp - 1000 watt, 120 volt, GE quartz-iodine bulb socketed in a lamp changer with an identical spare. The second bulb rotates into position and turns on whenever the first bulb fails.
Range - 24 miles. This is the distance that the light can be seen on a ship at sea. To someone in an airplane, the light would be visible 40-50 miles away.
Electrified - 1928. A 1/3 horsepower motor turns the lens carriage.
Automated - June 8, 1987. A photoelectric cell turns the bulb and motor on when the sun sets and off when the sun rises.
Daymark - Red with black lantern. Coastal lighthouses have different markings to enable ships to determine their location during daylight.
Characteristics - Flashes 1.2 seconds, eclipses (darkens) 6.6 seconds, flashes 1.2 seconds, eclipses 21 seconds, and then repeats the cycle. The bulb does not blink (neither did the original oil lamps, which is why the lens rotated). As the bull's-eyes (there are four) cross the viewer's line of sight, the bursts of light are perceived as a flash.
Lighthouse Keepers - Capt. Thomas Twiner, head 1860; Capt. Jose F. Papy, head 1861; Capt. William B. Davis, head 1866-68; Capt. James Arango Armour, asst. 1866-68, head 1868-1908; Charles R. Carlin, assistant 1871-75; Hannibal D. Pierce, assistant, 1873; Melville Spencer, assistant 1878-84; Dwight Allen, assistant 1885-90; Capt. Joseph Wells, asst. 1894-198, head 1908-1919; Capt. Thomas J. Knight, head, a few months in 1919; Capt. Charles Seabrook, head 1919-1947; Raymond C. Phillips (USCG), head, 3 years 1950s-60s