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.
What is a lumen?
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 start the arc and limit current flow through an HID lamp.
