LM 79 Testing Laboratories
LM-79 is a method approval for taking electrical and photometric measurements of SSL products. So KC India is providing you accurate LM-79 testing by experts in very short period of time. LM-79 covers total flux (light output), electrical power, efficacy, chromaticity, and intensity distribution. The five required metrics on the LED Lighting Facts label come from LM-79 testing Laboratories results.
What is LM-79 Testing?
Everyone knows about it, in 2008, the Illuminating Engineering Society published LM-79-08, Approved Method for the Electrical and Photometric Measurements of Solid-State Lighting Products. LM-79 testing lab
capture performance nature of products that feature solid-state lighting (SSL), including light-emitting diodes (LEDs).
Why we use LM-79 Testing Lab?
LM-79 testing lab provides a snapshot of performance under specified operating conditions at some point in the life of a product, usually at the beginning of operation — these are referred to as initial measurements. It never address permanent ratings, changing performance over time (e.g., lumen maintenance), or LED case temperature.
1. The LM-79 methods are really applicable to integrated LED products, such as luminaries and replacement lamps. It is not applicable to LED packages, modules, or arrays
2. LM-79 is the method for testing electrical and photometric measurements of solid-state lighting products.
3. LM-79 contains procedures for performing reproducible measurements of LEDs properties, including: total flux, electrical power, efficacy and chromaticity.
4. The scope of LM-79 Testing Laboratories applie to LED products that incorporate control electronics and heat sinks. This covers complete LED luminaries and integrated LED sources. It does not include bare LED chips or LED based products without a light source.
What is important aspect of LM-79 Testing?
LM-79 testing requires complete luminaries testing on an absolute photometric basis. Typically lighting products are evaluated on a relative photometric basis, where separate tests are done for lamps luminaries. However, for solid state lighting products the LED lamps typically cannot be separated from their luminaries. The absolute photometric testing required measures the light distribution and light intensity of the complete luminaries.
In recent times, the term LM-79 Testing laboratories have become part of our lighting lexicon and have been treated in some cases as lighting program all its own. While many lighting programs such as DLC and Energy Star reference LM-79 procedures, it is not in and of itself a lighting program with specified requirements and pass/fail criteria.
However, the term LM-79 Testing Lab has come to generally be recognized as two distinct tests – a candela distribution test with an IES file, and an integrating sphere test for a standard color (CCT, CRI, Duv, chromaticity coordinates). Nevertheless, anytime LM-79 is mentioned in reference to desired testing, our staff will verify exactly what the customer requires since many measurement options are discussed in the official document.