Jens Pedersen Groves
Invented the Vippefyr in Denmark in 1624
Francis H Greenway
Australian lighthouse architect and builder
Benjamin Franklin Greenough
Tested chemical-oil in the Boston lighthouse in 1840
Zenobe T Gramme
Invented an electrical generator used in lighthouses for arc lamps
Alexander Gordon
Patented a holophotal lens apparatus in 1834 in England also designed cast-iron lighthouse towers
Davies Gilbert
Built lighthouses lenses for Sir David Brewster in Scotland
Dr. Abraham Gesner
Distilled kerosene from coal
Robert Gellerstad
Designed a telescopic lighthouse tower in Sweden
John N Gamewell
Invented a fog-bell clockwork striker
Joseph A Funck
Invented and improved many styles of lamps for lighthouses