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sodium vapour lamp

Know how halogen and fluorescent bulbs, as well as sodium, mercury, and metal-halide vapour lamps, and LEDs work

Roman bronze oil lamp with lions and dolphins, from the Baths of Julian, Paris, 1st century ad; in the British Museum

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Shadow of a man holding large knife in his hand inside of some dark, spooky buiding

7 of History's Most Notorious Serial Killers

Drinking water is poured into a glass.

Water Fluoridation: Just the Facts

Gutzon Borglum. Presidents. Sculpture. National park. George Washington. Thomas Jefferson. Theodore Roosevelt. Abraham Lincoln. Mount Rushmore National Memorial, South Dakota.

9 Memorials and Monuments in the United States

Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.

What Is the Emoluments Clause?

Ethel Rosenberg arrested in August 1950. Photograph dated Aug. 8, 1950. American civilians executed for espionage. Spies, communists, Julius Rosenberg

Spies Like Us: 10 Famous Names in the Espionage Game

Poker game. Card game. Royal Flush in poker. Hearts suit gambling

Poker Hands Ranked

Happy, smiling, flying pig

7 Everyday English Idioms and Where They Come From

lamp: Related Content

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Photos and Videos

sodium vapour lamp

Roman bronze oil lamp with lions and dolphins, from the Baths of Julian, Paris, 1st century ad; in the British Museum

Know how halogen and fluorescent bulbs, as well as sodium, mercury, and metal-halide vapour lamps, and LEDs work

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Topics

gas light atmospheric arc lamp luminescent lamp oil lamp gas mantle Globar lamp saucer lamp mercury-arc lamp safety lamp lantern candle flare flash lamp rushlight searchlight

Key People

Willis Rodney Whitney

American chemist