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Since 1906, when the IES was legally incorporated, the IES has always been known as the "IES". However, in 1981 the 6th edition IES Lighting Handbook published the phrase, "Illuminating Engineering Society of North America("IESNA"). The "IESNA" moniker persisted until it was removed in 2010 when the 10th Edition of Lighting Handbook was released.
Lighting Power Density (LPD) is a lighting power requirement defined in North America by the American National Standards Institute (ANSI), American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), and the Illuminating Engineering Society of North America (IESNA) Lighting subcommittee.
ANSI/ASHRAE/IES Standard 90.1: Energy Standard for Buildings Except Low-Rise Residential Buildings is an American National Standards Institute (ANSI) standard published by ASHRAE and jointly sponsored by the Illuminating Engineering Society (IES) that provides minimum requirements for energy efficient designs for buildings except for low-rise residential buildings (i.e. single-family homes ...
System Core Requirements [GR-1] ²: Reduce lighting power density (LPD) with respect to all interior and exterior lighting systems by a minimum of 25%. [GR-2]: Facility must comply with recommended ASHRAE/IESNA Lighting Power Allowance (LPA) by either: [A] the whole building method or [B] space-by-space method.
IESNA LM-80 is the Department of Energy (DOE) approved testing method for measuring lumen depreciation of solid-state (LED) light sources, arrays and modules. [8] The Illuminating Engineering Society (IES) and the Department of Energy Solid State Lighting Standards Development group worked together to create the LM-80 test criteria.
The criteria were based on the lighting industry standards and test procedures. [31] Light fixtures which have earned Energy Star combine quality design with the high energy efficiency. [32] To qualify for an Energy Star rating light fixtures must: [33] Uses 1/4 the energy of traditional lighting; Reduced energy bills and bulb replacement.
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Luminaire Dirt Depreciation (LDD): It is the light loss prior to cleaning dust. LDD is estimated from tables in IESNA Lighting handbook. Room Surface Dirt Depreciation (RSDD): This value accounts for dirt or dust that accumulates on all of the room surfaces — especially on the upper walls and ceiling. RSDD is also estimated from handbook tables.