public lighting
51Light pollution — This article is about light pollution in the visible spectrum. For information on pollution in the radio spectrum, see radio spectrum pollution. This time exposure photo of New York City at night shows skyglow, one form of light pollution …
52Menorah (Hanukkah) — Hanukkah Lamp, Eastern Galicia or Western Ukraine, 18th to mid 19th century from the collection of The Jewish Museum (New York) …
53Diffusion of technology in Canada — This article outlines the history of the diffusion or spread of technology in Canada. Technologies chosen for treatment here include, in rough order, transportation, communication, energy, materials, industry, public works, public services… …
54Technological and industrial history of Canada — The technological and industrial history of Canada encompasses the country s development in the areas of transportation, communication, energy, materials, public works, public services (health care), domestic/consumer and defense technologies.… …
55Mark Sutton Vane — is an English architectural lighting designer. Vane was born in London, England, and studied architecture at the University of Westminster.[citation needed] He then started work at the Laserium in the London Planetarium. Here he used a visual… …
561939 New York World's Fair — 1939 World s Fair redirects here. The term can also refer to the Golden Gate International Exposition, which was held in San Francisco/Oakland at the same time as the New York fair. Trylon, Perisphere and Helicline photo by Sam Gottscho The… …
57Municipal or urban engineering — applies the tools of science, art and engineering in an urban environment. Contents 1 Summary 2 History 3 Professional practice 4 International Organisation …
58Light-emitting diode — LED redirects here. For other uses, see LED (disambiguation). Light emitting diode Red, pure green and blue LEDs of the 5mm diffused type Type Passive, optoelectronic Working principle Electr …
59Street light — A street light, lamppost, street lamp, light standard or lamp standard, is a raised source of light on the edge of a road, turned on or lit at a certain time every night. Modern lamps may also have light sensitive photocells to turn them on at… …
60Daytime running lamp — A daytime running lamp (DRL, also daylight running lamp or daytime running light) is an automotive lighting device on the front of a roadgoing motor vehicle, installed in pairs, automatically switched on when the vehicle is moving forward,… …
