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Lighting Reference Libraries

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Incandescent Light Bulb
2010-09-29 16:52:36

The incandescent light bulb provides a source of electric light through incandescence. The bulb works by passing current through a filament which heats to a temperature that produces light. The glass bulb that contains the filament prevents oxidation of the hot filament. The bulbs are also called electric lamps. Incandescent bulbs come in a various sizes and voltages. They can range from...

Yablochkov Pavel Nikolayevich
2009-04-23 12:28:48

Pavel Nikolayevich Yablochkov (September 14, 1847 "“ March 31, 1984) was a Russian electrical engineer, inventor, and businessman. His most notable invention was a type of electric carbon arc lamp, called the Yablochkov candle. Yablochkov graduated from Mykolayiv Engineering Institute as a military engineer in 1866. In 1869, he continued his education at the Galvanic School in St....

Light Pollution
2004-10-19 04:45:43

Light Pollution -- Light pollution refers to excess light, created by human activities, that brightens the night sky enough to hide many stars from observers. For the average person, light pollution means that even on a clear, moonless night, only a few stars may be visible. When a city grows up near an astronomical observatory, light pollution can make the observatory effectively useless....

Word of the Day
bretelles
  • In dressmaking, straps running from the belt in front over the shoulders to the belt in the back, with more or less elaboration of trimming and outline. They usually broaden at the shoulder and narrow toward the waist.
The word 'bretelles' comes from a French word meaning 'braces'.