TEST YOUR LIGHTING IQ
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
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
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