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

How is light bulb brightness measured?

Joules

Footcandles

Lumens

Watts

Who patented the incandescent light bulb?

David Melville

Nikola Tesla

Thomas Edison

Emmett Wiley

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

Which of the following is NOT a type of lighting control?

Dimmers

Timers

Pendants

Photosensors

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

More Quizzes