Lighting Equipment Flashcards
The visible spectrum of light is between…
400 to 700 nm (nano meters)
A value that represents the colour of light a lamp will produce is known as…
correlated colour-temperature? (CCT)
A value that gives an indication of how well a light source reproduces the actual colours of an object is…
Colour rendering index (CRI)
What is a candela?
A candela is approximately the amount of light from a standard candle.
What is a lumen?
It is the measurement of the quantity of light.
What is a Lux?
It is the amount of illumination on an area of one meter square.
What is used to describe how effective a light source is at producing the desired light from a specific amount of power?
Efficacy (lm/W - lumens per watt)
What are the 3 main types of light sources?
1) Incandescent
2) Electric Discharge Lighting (fluorescent & high intensity discharge)
3) Light emitting diodes (LED)
What do all electric discharge lighting lamps require?
A ballast to start the arc in electric discharge tubes and limit the current flow through the vapour.
What are the two types of fluorescent lamps?
Linear lamps & compact fluorescent lamps
Compact fluorescent lamps can be both…
Integrated, meaning they are self-ballasted &
Non-integrated, meaning they require a separate ballast in the luminaire.
High intensity discharge lamps include…
Mercury vapour
High-pressure sodium and
Metal halide : Quartz & ceramic
What is a lamp?
A light bulb, fluorescent tube, a compact fluorescent lamp or other device that is a source of light.
A fixture or lighting fixture is called?
A luminaire
The part of a luminaire that physically holds the lamp in place and connects it to its electrical supply is called?
A lampholder
What are the two types of ballasts?
Electromagnetic ballasts - composed of electromagnetic coils
&
Electronic ballasts - composed of solid state components
What is used to cover the outlet box where a luminaire’s conductors connect to the branch circuit?
A luminaire canopy
What is a canopy switch?
It’s a small switch that controls the power to the lampholder of a luminaire that is commonly mounted to the luminaire.
According to rule 30-104 protection, lighting circuits in dwelling units must be protected by an over current device rated at…
A maximum of 15 amps
What does polarization of a luminaire mean?
That the identified conductor must be connected to the identified terminal or the identified conductor to the light fixture.
What is the maximum allowable voltage to ground for a circuit in a dwelling unit?
150 volts
Light is a form of?
Electromagnetic radiation
