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When: 1879
Where: Menlo Park, NJ
Who：Inventor Thomas Edison
What：
After applying to the Patent Office on this date for his carbon fiber filament, electric lightbulb. The next day he conducted his most successful test: a light that had burned continuously for over 13 hours. It was the first practical and commercial incandescent light bulb.
Why significant：
Gas and oil lighting were the most common forms of illumination until this time, Those forms posed obvious safety hazards and Edison's goal was to create a new form using his particularly favored current of electricity.
Tags：Alternate Current, Direct Current (AC DC), Westinghouse
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