4.1 Flashcards
_____ has played an important role in human activity throughout history.
Light
Up until the early part of the 20th century, people have relied on natural lighting and flame sources such as ____, __________, __________, _________, _______ and _______ but with the advent of electricity and incandescent lamps communities started switching to the safer, cost-effective electricity powered lighting.
wood, candle wax, whale oil, coal oil, coal gas, kerosene
the earliest known unit of illumination still used today
Foot-candle
_____________, a German chemist who invented a more efficient vacuum pump in ____ which was critical to the development of incandescent light bulbs.
Herman Sprengel, 1865
_______________, first developed a working incandescent light bulb using carbon-filament lamp in _______________
Joseph Swan, February 5, 1879
First to develop a commercially feasible electric light, a low-cost lamp that could remain lit for a long period of time.
Thomas Alva Edison
Thomas Alva Edison first announced the successful development of an incandescent lamp with a baked carbonized cotton thread filament in ________________
December 21, 1879
What year did the Edison Electric Light Company power incandescent streetlights and lamps in parts of London and later in New York which served as a model for future utilities?
1882
On _____________. the Niagara Falls Power Company became the first commercial utility to produce and transmit hydroelectric power.
August 28, 1895
In ______, General Electric introduced fluorescent lighting, an electric light source that is more efficient than the incandescent lamp.
1939
Developed technical standards, specifications, and design techniques that govern the design and construction of building lighting and electrical systems.
Professional Organization
IESNA
Illuminating Engineering Society of North America
IALD
International Association of Lighting Designers
NEMA
National Electrical Manufacturers Association
ALA
American Lighting Association