Lighting Basics Part 1: How we see light & Common Terms
What's the difference between a fixture and a luminaire?
A fixture is a complete lighting device, while a luminaire is just the lamp component
A fixture turns into a luminaire once a lamp is installed
A luminaiare is the whole lighting device that includes the light source and provides illumination
What's the difference between paint and light?
Paint is subtractive, while light is additive meaning when you add Red, Blue and Green it gives you white light
Paint is additive, while light is subtractive meaning you subtract Red, Green, and Blue to get white light
What's the name of the Diagram that shows Red, Green, Blue Light
Correlated Color Temperature
Color Rendering
Electromagnetic Spectrum
Chromaticity Diagram
What's the line in them middle of the Chromaticity Diagram where white light falls
CCT
Black Body Curve
Black Line
What's the recommended CCT to use for an Office
3000K
4000K
5000K
CRI Stands for
Correlated Reference Index
Color Render Index
Color Rendering Index
In order to perceive a color, the source must produce the color and the object must ______________ the color
Absorb
Reflect
Mirror
What source has the least spikes and peaks when it comes to Spectral Power Distribution
Incandescent
Halogen
The Sun
LED
The sum quantity of visible light produced by a lamp in all directions
Lumens
Luminous Flux
Illuminance
Illuminance is measured in foot-candles
TRUE
FALSE
The equation for Efficiency of a light source is
Watts divided by lumens
Lumens divided by Watts
Voltage divided by lumens
What's the difference between life ratings of a traditional light source and an LED light source
Traditional light source is measured by L70, LED is measured by B50
LED is measured by L70, traditional light source is measured by B50
B50 also known as average rated life means
If you have 100 lighting devices, B50 is the point at which 50% would be burned out. This applies to any light source.
If you have 100 lighting devices, B50 is the point at which 50% would be burned out. This applies to Traditional Light Sources.
If you have 100 lighting devices, B50 is the point at which 50% would be burned out. This applies to LED light sources.
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