The Electric Light System - Thomas Edison National Historical Park (U.S. National Park Service)
Edison's first successful electric lamp | SPARK Museum of Electrical Invention
The First Commercially Available Electric Lamp Photograph by Science Photo Library - Fine Art America
Who Invented the Light Bulb? It Wasn't Just Edison | HowStuffWorks
Arc Lamps - How They Work & History
Edison Image Gallery | PBS LearningMedia
The History of the Light Bulb | Department of Energy
Electrical history: Lighting before the incandescent bulb | SPARK Museum of Electrical Invention
Levine Lighting Gallery
light bulb timeline | Timetoast timelines
Light Bulb Invention | Light Bulb Facts | DK Find Out
Early light bulbs: left: first commercial light bulb, right: electric filament lamp made by Thomas Alva Edison
Dec. 18, 1878: Let There Be Light — Electric Light | WIRED
History of the First Lightbulb | Who Invented the Lightbulb?
Electric Lamp Invented By Thomas Edison In 1880 Photograph by Science Photo Library - Fine Art America
BBC - A History of the World - Object : One of the First Electric Light Bulbs
First Electric Light Historical Marker
Edison's Lightbulb | The Franklin Institute
History of Electric Lighting - Invention of Electric Light
When electric lights first illuminated the city | Ephemeral New York
Dec. 18, 1878: Let There Be Light — Electric Light | WIRED
The history of electric lighting - Country Life
1848 Was The Year Of London's First Electric Light Festival | Londonist
History of the Light Bulb | Lighting Basics | Bulbs.com
