Georg William Frydenlund
Made lighthouse equipment in Denmark
Leonor Fresnel
Head of the French Service des Phares et Balises and brother of Augustin
Augustin Jean Fresnel
Invented the Fresnel lens and mulit-wick lamp for lighthouses
Captain William Buell Franklin
Invented an improved hydraulic lamp for lighthouses
Jean Jacques Francois
Took over Francois Soleil's lens factory and built Fresnel lenses
Charles F Franchot
Invented the moderator lamp in France in 1830
Robert Foulis
Invented steam whistle fog-signal in 1854 in Nova Scotia
Jean B Foucault
Invented carbon electrodes for arc lamps in France in 1843
Stanislas Fenestre
Partner with Barbier in France made Fresnel lenses and lamps
John F Farquhar
Invented many lighthouse lamps worked for Wilkins and Co.