When were led lights invented?

Answer Nick Holonyak invented LED (light-emitting diode) light bulbs in 1962 when he worked for General Electric. The original model produced red light. Cars use LEDs in headlights, dashboards and interi... Read More »

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When were fluorescent lights invented?

Fluorescent lights were invented in Germany by Meyer, Spanner and Germer; a U.S. patent application was filed for their invention in 1927. The application was acquired by General Electric for $180,... Read More »

When were street lights invented?

The first ever streetlights put into use were on London's Pall Mall. They were first lit on Jan 28, 1807 and lead the way for other towns to take up gas street lighting. In the early days a lamp li... Read More »

When were cell phones invented&who were they made by?

Martin Cooper invented the cell phone in 1973, and Motorola was its maker. The phone was much bigger and heavier than today's models. Called the DynaTAC, the phone did not go one sale until 10 year... Read More »

When were strobe lights first introduced?

Dr. Harold Edgerton invented the strobe light in 1926 during his graduate work at the Massachusetts Institute of Technology. He was studying the effects of high-speed flashes in photography, which ... Read More »