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Sustainable Landscape Construction
Lighting Glossary
19
Architecture
Undergraduate 3
11/01/2010

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Cards

Term
lamp
Definition
bulb
Term
luminare
Definition
fixture, holds a lamp/bulb
Term
wattage
Definition
"60-watt" used to mean a specific brightness. watts no longer parallel brightness
Term
light
Definition
wave-like, separate energy packets (quanta)
Term
light's total energy
Definition
radiation, radiance, radiant flux
Term
measuring light
Definition
radiometry (units: watts, joules)
Term
visible light measurements
Definition
photometric, photopic
Term
luminance
Definition
light production, measured in candelas
Term
luminous flux
Definition
light moving or flowing through air
Term
luminous intensity
Definition
directional light flow
Term
illuminance, illumination
Definition
light striking an object being visible
Term
efficacy
Definition
how well electrical energy is converted to light by a particular technology (measured in lumens per watt)
Term
efficiency
Definition
how much light comes out of a luminare, available for illuminating things
Term
color temperature
Definition
precise color measurement of light. measured in degrees kelvin
Term
standard
Definition
pole for a luminare
Term
spectral de-rating
Definition
lamp efficacy (energy efficiency) discounted for strongly colored light, which does not produce as good visibility as near-white light
Term
light pollution
Definition
light obstructing night visibility or telescopes
Term
ecological light pollution
Definition
light that confuses, disrupts, or harms biological ecosystem functions
Term
light trespass
Definition
light that violates property boundaries and irritates neighbors
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