IES LM-79 "Electrical and Photometric Measurements of Solid-State Lighting Products"
Quantity : 100 Price : Contact me
As the development of LED technology continues to grow and diversify, the need for consistent and standardized testing procedures for LED has become more prevalent than ever. SHNEZHEN Southern LCS Compliance Testing Laboratory Ltd. is an NIST NVLAP Accredited testing for LM-79 (NVLAP Lab Code: 600167-0).
LCS Testing Laboratory has made strides to stay current with the new testing standard LM-79 set forth by the IESNA (Illuminating Engineering Society of North America). In addition, "IN-SITU" testing is now a priority when testing our LED light systems for more reliable results.
IES LM-79 "Electrical and Photometric Measurements of Solid-State Lighting Products"
Approved method describing procedures and precautions in performing reproducible measurements of LEDs:
- Total luminous flux
- Electrical powers
- Luminous Intensity distribution
- Efficacy (lm/watt)
- Chromaticity
LM-79 Scope
Applies to LED-based products incorporating control electronics and heat sinks, that is, those devices that require only AC mains power or a DC voltage power supply to operate.
Absolute Photometry Basis
- LM-79 requires complete luminaire testing
- Traditionally, photometric evaluation of lighting products is based on separate tests for lamps and luminaires ("relative")
- For SSL products, LED lamps typically cannot be separated from their luminaire because of heat effects ("absolute")
Relative vs. Absolute Photometry
- Relative testing – Lamps of interest and luminaire (with reference lamp) are measured separately. Then the actual light distribution and intensity of the complete luminaire of interest is derived by normalization of the test data
- Absolute testing – The actual light distribution and intensity of the luminaire of interest is measured directly from the complete luminaire.

Contact : Liz Cheung, +13 1 29 20 65 15
Good deal: buying from seller
We invite you to read our terms of use. You can also visit our FAQ section and see our information section on the risks associated with counterfeiting.
|
This page is about importers and exporters of IES LM-79 "Electrical and Photometric Measurements of Solid-State Lighting Products" Search in a category : Equipment goods Search in a category : lighting, electrical, solid, measurements, products, photometric, state |
Sunday, November 05, 2006
Quantity : ANY - Price : LOWEST.
Dear sir, We are leading Merchant Exporter Engaged in Ceramic glazed(wall/floor/porcelain ) Tiles ,Sanitarywares,Decorative Border tiles,Decorative Roofing tiles,Wall clocks,Alarm clocks. Our products have got wide acceptability in many African,Gulf,Middle East and South asian countries...
dedania overseas
- dedania
- 363642 - morbi-2
- +919879234350
Tuesday, April 28, 2026
Quantity : cremones h - Price : cremones handles
FUNDICIONES JULCAR S.L is specialized in ALUMINUM AND STAINLESS STEEL HARDWARE FOR DOORS AND WINDOWS (innovative pressure lock handles, cremones handles, double door handle, pull handles, tilt & turn systems, European kit, macollas Feel free to visit our website: www.julcarherrajes...)
FUNDICIONES JULCAR
- julcar
- 09001 - burgos
- +34 9 47 29 80 87
- +34 6 06 59 78 72
Thursday, April 17, 2014
Quantity : 1000 KG - Price : 40 à 60 euro le kilo
vanilla beans , vanilla podwer, seed of vanilla are products offered by our company. In fact these products are all checked suppliers at quality and meet the international standard these are natural products from madagascar, saying in another term bio product Location : BP 97 sambava 208...
inova vanille SARL
- 208 - SAMBAVA
- 261324044215




