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Gas Lighting
Gas lighting of buildings and streets began early in the 19th century, with most streets in London lit by gas as early as 1816. -
Incandescent Lamp
Thomas Edison bulbs made after 1880 lasted a whopping 600 hours. -
Halogen lightbulb
First lamp to use halogen gas (chlorine) was patented in 1882 but the first commercial halogen lamp that used iodine as a halogen gas was patented in 1959 by General Electric. -
Light Emitting Diodies
Nick Holonyak Jr., employed in General Electric, developed in 1962 first light-emitting diode that emitted light in the visible part of the frequency range. It was a red LED. -
Compact Fluorescent Lightbulb (CFL)
1976 – Edward E. Hammer invented the compact fluorescent light (CFL) after discovering a way to bend fluorescent tubes into a spiral shape in response to the 1973 oil crisis.