Electrical & Lighting
Most of the industrialized world is lit by electric lights, which are used both at night and to provide additional light during the daytime. more...
 Home
ATV Parts
Apparel & Merchandise
Automotive Tools
Aviation Parts
Boat Parts
 Accessories & Gear
Anchoring, Docking
Body Parts
Controls & Steering
Deck & Cabin Hardware
Electrical & Lighting
Electronics & Navigation
Exhaust
Ignition & Starting Systems
Intake & Fuel System
Interior, Cabin & Galley
Memorabilia
Motors/Engines & Components
Other Boat Parts
Plumbing & Ventilation
Propellers
Sailing Hardware & Gear
Car & Truck Parts
Car Audio, Video
Manuals & Literature
Motorcycle Parts
Other Vehicle Parts
Personal Watercraft Parts
Racing Parts
Services & Installation
Snowmobile Parts
Vintage Car & Truck Parts
Wholesale Lots
These lights are normally powered by the electric grid, but some run on local generators, and emergency generators serve as backups in hospitals and other locations where a loss of power could be catastrophic. Battery-powered lights, usually called "flashlights" or "torches", are used for portability and as backups when the main lights fail.
Types
Types of electric lighting include:
incandescent light bulbs;
arc lamps;
gas discharge lamps, e.g., fluorescent lights and Compact fluorescent lamps, neon lamps, flood lamps, modern photographic flashes;
lasers;
light-emitting diodes, including OLEDs;
sulfur lamps;
Different types of lights have vastly differing efficiencies.
*Color temperature is defined as the temperature of a black body emitting a similar spectrum; these spectra are quite different from those of black bodies.
The most efficient source of electric light is the low-pressure sodium lamp. It produces an almost monochromatic orange light, which severely distorts color perception. For this reason, it is generally reserved for outdoor public lighting usages. Low-pressure sodium lights are favoured for public lighting by astronomers, since the light pollution that they generate can be easily filtered, contrary to broadband or continuous spectra.
Vendors
GE Lighting;
Osram;
Philips ;
Public lighting
The total amount of artificial light is sufficient for cities to be easily visible at night from the air, and from space. This wasted light should not be confused with the light pollution that burdens astronomers and others, although it is the source of it.
 Read more at Wikipedia.org
• [List your site here Free!]
|
