Introduction Flashcards
Lighting accounts for _____ to ____% of the electricty in US and Canada and almost ______ % of total global electricity consumption.
20, 25, 20
The fundamental reasons for providing light in a space are to make ________ in the space ________ and to conduct activities that must take place in the ___________.
objects, visible, space
Good architectural lighting provides the right quantity of _______, with excellent color _________ and minimal _____________.
light, rendition, glare
_______________ has played an important role in human activity throughout history.
Light
Up until the early part of _________ century, people have relied on ___________ and___________ such as wood, candle wax, whale oil, coal oil, coal gas and kerosene but with advent of _____________ and _______________, communities started swithcing to safer, cost effective powered lighting,
20th century, natural lighting, flame sources, electricity, incandescent lamps
The earliest known unit of illumination still used today.
foot-candle
A German __________ invented a more efficient vacuum pump in _________ which was critical to the development of incandescent light bulb.
Herman Sprengel, chemist, 1865
First developed a working incandescent light bulb using a carbon-filament lamp in __________________.
Joseph Swan, 02-05-1879
first announced the succesful development of an incandescent lamp with a baked __________ cotton thread filament in __________________.
Thomas Alva Edison, carbonized, 12-21-1879
He was the first to develop commercially FEASIBLE _____________, a low-cost lamp that could remain lit for a long period of time.
Thomas Alva Edison, electric light
When did Edison Electric Light Company which was later known as ______________________ powered incandescent streetlights and lamps in parts of _________ and later in __________ which served as a model for future utilities.
1882,Consolidated Edison Company , London, New York,
On ________________ , the Niagra Falls Power Company became the first utility to produce and transmit ________________.
08-26-1895, hydroelectric power
In __________, General Electric introduced _______________ lighting, an electric light source that is more efficient than incandescent lamp.
1939, fluorescent
Professional Organization (P.O.) developed ________________, ______________ and ____________ that govern the design and construction of building lighting and electrical systems.
technical standards, specifications, design techniques
IESNA
Illuminating Engineering Society of North America