Chapter 110 Flashcards
What is the function of the luminaire in terms of a lamp?
Direct or control the light produced
A lighting unit including the lamp, a voltage controlling device or ballast and the means of light control (reflector and refractor) is what?
Luminaire
Types of luminaries consist of four kinds:
Recessed troffers, ceiling mount wraparounds, open reflectors and structural lighting
Employing occupancy sensors can reduce lighting costs by?
20-60%
Two most common types of occupancy sensors:
Infrared and ultrasonic
Motion detector that responds to heat
Infrared
Motion sensor that responds to motion
Ultrasonic
In large building what percent of the electrical load is lighting usually?
60
Occupancy sensors are what kind of switches?
Automatic
Lumens per watt is the measurement of what efficiency?
Lamps