Morant Point Lighthouse was created in 1841.
To answer your question the Island of Jamiaca is 180 nautical miles east to west (wide) measured from the Point Morant lighthouse to the Negril Lighthouse.
New Point Loma lighthouse was created in 1891.
Bull Point Lighthouse was created in 1879.
Hartland Point Lighthouse was created in 1874.
Point Isabel Lighthouse was created in 1852.
Tacking Point Lighthouse was created in 1879.
Split Point Lighthouse was created in 1891.
Plumb Point Lighthouse was created in 1853.
Bugui Point Lighthouse was created in 1902.
Point Sur Lighthouse was created in 1889.
Pigeon Point Lighthouse was created in 2000.
Bagacay Point Lighthouse was created in 1905.