The standard “ANSI/IES LM-79-24 Optical and electrical measurements of solid-state lighting products”, jointly developed by the American National Standards Institute (ANSI) and the Illumination Engineering Society (IES), describes the procedures to be followed and precautions to be observed when performing repeatable accurate measurements of derived system efficacy and color quantities of solid-state lighting products for the following lighting purposes under standard conditions:
This approved method covers LED luminaires, OLED luminaires, integrated LED lamps, integrated OLED lamps, non-integrated LED lamps driven by a driver specified by the manufacturer's identification number or a defined reference circuit, and all solid-state lighting products or LED light engines. Solid-state lighting products, other than non-integrated LED lamps, are designed to be connected directly to AC mains power or to a DC voltage power source for operation. However, this standard does not cover solid-state lighting products that require external heat sinks or components of solid-state lighting products such as LED packages or LED arrays.
A number of changes have been made to this latest update of the standard to update the information and provide better guidance based on information gathered from laboratory accreditation and independent research-related proficiency testing. This updated standard provides more rigorous and standardized methods for testing the photometric and electrical performance of LED solid state lighting products.
This standard is a critical benchmark for the LED solid-state lighting industry and serves as a fundamental reference for energy efficiency certification programs in numerous countries globally. It serves as a benchmark for determining the quality of solid-state lighting products and driving industry development.
The updated requirements in this test method are intended to minimize the burden on test laboratories while reducing the variability of measurement results between test laboratories. The method is based on absolute photometry, which addresses the requirements for optical and electrical measurement of solid-state lighting products.
Solid-state lighting products, as defined in this standard, use light emitting diodes, including inorganic LEDs and organic LEDs (OLEDs), as optical radiation sources to produce light for lighting purposes. An overview of LEDs and lighting is included in ANSI/IES LP-4-20.1. While constant current control is typical for individual LEDs, this standard addresses integrated solid-state lighting products that include current control at the semiconductor device level, so the electrical parameters of interest are the input electrical parameters of the solid-state lighting product.
Solid-state lighting refers to a type of lighting that uses solid-state electroluminescence instead of gas or filament-based light sources. Instead of light bulbs such as incandescent or fluorescent lamps, solid-state lighting devices use semiconductors to convert electricity directly into light. The most common solid-state lighting technologies are:
The key features of solid state lighting are:
The most common application areas are home and commercial lighting, street lamps and special uses such as automotive lighting, displays (televisions, smartphones, virtual reality headsets), horticultural, medical and UV disinfection lighting. In short, solid state lighting is a major leap forward for energy-efficient and versatile lighting technologies.
Our organization, which has been trying to support businesses from every sector with its testing, measurement, analysis and evaluation studies carried out in a wide range for years, has a strong staff that closely follows the developments in the world in the field of science and technology and constantly improves itself. In this context, testing services in accordance with the "ANSI/IES LM-79-24 Optical and electrical measurements of solid state lighting products" standard are also provided to businesses.
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