Installation of Lighting Equipment Flashcards
What is the wavelength range of visible light?
What is the colour associated with the longest wavelength of this range?
400-700 nanometers
Red
What is a correlated colour temperature?
What are two common values & associated “colours”?
Value to give an idea of the colour of light produced.
- 5100K cool white (bluish)
- 2700K warm white (yellow/orange)
What is candela?
Measure of the brightness of a light source. Approximately the amount of light from one candle.
Don’t use this card. There is another card for Lumens.
What is a lumen?
Don’t use this card.
The quantity of light. Candela/second
What is lux?
Amount of illumination on an area. Lumens/meter2
What is efficacy?
How “efficient” a light is. Lumens/watt
What are three electric lighting sources?
- Incandescent
- Electric discharge lighting
- Light emitting diode
How do fluorescent lamps work?
Electric current is passed through a mercury vapour which produces an ultraviolet light, causing the phosphor coated tube to glow.
Approximately what percentage of energy in an incandescent lamp is produced as heat?
88%
What is a halogen lamp’s bulb made of?
Quartz
Do compact fluorescent lamps require a separate ballast?
Only if “non-integrated”
What is the filament material in a standard incandescent lamp?
Tungsten
What is the major downside to using LED lamps?
Price.
What is the difference between a lamp and a luminaire?
A lamp is the bulb or source of light and a luminaire is a lighting fixture.
What is the purpose of a ballast?
To create an arc to start a lamp and to limit current flow through a lamp.
What is the maximum current allowed for a lighting circuit in a single dwelling?
15 amperes.
What is a colour rendering index? (CRI)
A value which gives an indication of how well a light source reproduces the actual colours of an object.
100 is ideal.
In emergency lighting systems, the voltage drop shall not exceed 3% of the marked unit equipment. T or F?
False, it cannot exceed 5%
Emergency lighting equipment cannot be solely battery powered if the marked input rating exceeds _____ amperage or _____ voltage.
24 Amps
250 Volts
If it exceeds these values the unit equipment must be permanently connected
In dwelling unit branch circuits, what is the maximum volts-to-ground?
150
Which wavelength cannot be seen, but can be felt as heat?
A) Infrared
B) Ultraviolet
C) Fluorescent green
D) Bright blue
Infrared
In what two locations can emergency lighting circuits be ran with other wiring/equipment?
In transfer switches and emergency lighting supplied by two sources
What two types of ballasts are used for fluorescent lamps?
Magnetic and Electronic
Which visible colour has the shortest wavelength?
Violet (400nm)