Advanced Lighting Guidelines Glossary
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ALL A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9
Item
Definition
IES Illuminating Engineering Society Original Chapter Source: Policies & Programs More »
Illuminance The area density of the luminous flux incident at a point on a surface. Units are Lumens per square foot… More »
Incandescent lamps Sources which produce light by utilizing long, thin filaments (usually made from tungsten) and heated to high temperatures (2700-3000 Kelvins… More »
Incandescent Reflector Lamp Incandescent/Halogen lamp fitted with an integral reflector used to focus light output in a desired direction and pattern. Original Chapter… More »
Induction Lamps A lamp that is power by an electromagnetic field rather than through lamp electrodes or direct electrical connections. Original Chapter… More »
Ingress protection (IP) rating International Protection (IP) rating system defined by International Standard IEC 60529, which classifies degrees of protection for electrical devices against… More »
Initial Cost (or First Cost or Initial Installed Cost) All the costs to purchase and install a fully functioning system. Original Chapter Source: Design Considerations Provided By: Leslie North More »
Input power Input power describes the amount of electric power, expressed in watts or kilowatts (1,000 watts), required to operate an electrical… More »
International Energy Conservation Code (IECC) The most commonly used residential energy code by states. Original Chapter Source: Daylighting Provided by: Kosta Papamichael / CLTC More »
Intrinsically photosensitive retinal ganglion cell (ipRGC) A ganglion cell in the retina which responds directly to incident light. The ipRGCs provide input to the human circadian… More »
Irradiance The incident radiant flux per unit area of a surface. Irradiance is measured in watts / square meter. Original Chapter… More »
Isofootcandle or Isolux Contour lines linking points of the same footcandle or lux value. Original Chapter Source: Design Considerations Provided By: Leslie North More »
ALL A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9

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