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