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WorksheetsLighting Quiz
Total questions: 10
Worksheet time: 3mins
How do LEDs generate light?
By heating up filament
By moving electrons in compound semiconductors
By ionizing mercury vapor in a glass tube
By moving electric current through a tube containing gas
How is light bulb brightness measured?
Joules
Footcandles
Lumens
Watts
Who patented the incandescent light bulb?
David Melville
Nikola Tesla
Thomas Edison
Emmett Wiley
A LED which uses 5 watts produces the approximate equivalent lamp output of a Tungsten Incandescent lamps rated at how many watts?
10W
20W
30W
40W
Which of the following is NOT true of LEDs?
The cost of LEDs has declined nearly 90 percent since 2008
LEDs are white light sources
LEDs have many benefits including energy savings potential, lower costs and improved performance
LEDs reduce the need for reflectors and diffusers
What's the main reason why LEDs are more energy efficient compared to other lighting options?
The process they use to convert electricity into light is more effective
They are made of higher quality materials
They use alternating current instead of direct current
They absorb less heat
What does illumination refer to?
The wavelength used to generate light
The ratio of light produced to energy consumed
The color patterns used in lighting
The distribution of light on a horizontal surface
What does daylighting mean?
Using light-reflective material outside buildings to keep heat and light from entering the building
Using windows and skylights to bring sunlight into buildings
Using windows, walls and floors to collect, store and distribute solar energy
Using landscaping to provide shade for buildings in the summer
What year was the first visible-spectrum LED invented?
1968
1962
1959
1973
Incandescent bulbs lose what percent of their energy as heat?
82 percent
95 percent
90 percent
70 percent
