As we all know about the strength of LM 79. Everything has its pros and cons. Let us have a look on the drawbacks of LM 79.
LM 79 depicts the parameters of the individual products. So the obtained Parameters cannot be used to access alike products.
Other limitation is the sample size. It does not state any sample size. So, the manufacturer provides only one sample instead of supplying more. This thus increases the vulnerability of lesser quality products.
This can be used only to determine complete luminary instead of LED used ( as based on absolute photometry) , which can produce different results due to quality of accessories used like glass, thermal effect, lenses etc.
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Wish this blog post will be help. If you have any other questions, please feel free to contact us. ITCIndia team looking forward work with you and get better together!
LM-79 is approved test method for electrical and photometric measurements of Solid State Lighting Products. It describes the procedure in measuring total luminous flux, electrical power, luminous intensity distribution, chromaticity under standard conditions. It covers LED based SSL products with control electronics and heat sink incorporated with AC or DC power supply. This does not include LED chips, LED package or LED module but luminaries (fixtures incorporating light source) as well as integrated LED lamps.
The equipment used in LM-79 is integrated sphere and goniophotometer.
Color quantities( chromaticity coordinates, CCT, CRI )
Spectral power distribution
Bandwidth of spectoradiometer, if spectral distribution and/or color quantities are reported.
Statement of uncertainties (if required)
Deviation from standard operating procedures, if any.
Here is the link of a test report issued by our prestigious company. LM 79 Test Outcomes
If you’re Buyers Demanding for LM-79 Testing– Contact Now!
Wish this blog post will be help. If you have any other questions, please feel free to contact us. ITCIndia team looking forward work with you and get better together!
LM 79 is an approved method that describes the procedure to be followed and precautions to be observed in performing reproducible measurements of total Luminous flux, electrical power, luminous intensity distribution, chromaticity of Solid-State lighting products for illumination purposes under standard conditions.
LM 79 covers-LED based SSL products with control electronics and heat sinks. Luminaries (fixtures incorporating light source) as well integrated LED lamps.
LM 79 doesn’t cover–fixtures without a light source, SSL products that require external operating.
LM 79
Test method for total luminous flux Measurements:
The total luminous flux of SSL product shall be measured with an Integrating Sphere or Goniophotometer. The method may be chosen depending upon what other measurements quantities (color, intensity distribution) need to be measured., the size of SSL products, and other requirements.
The integrating sphere is suited for total luminous flux and color measurements of integrated LED lamps and relative small size LED luminaries. Advantage of using integrating sphere is that it does not requires the “ Dark Room”., and also it is less time consuming.
The Goniophotometer provides measurements of Luminous Intensity Distribution as well as total luminous flux. It can take measurements of larger size luminaries as well as small size luminaries. It has to be installed in Dark Room. Measurements in goniophotometer are time consuming.
Light Intensity Distribution , Total Luminous Flux
Duration of Test
Fast Measurements
Time consuming as compared to Sphere photometer.
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LM-79 is an approved method for taking electrical and photometric measurements of SSL products. It 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 results.
ITCIndia Offering you a complete choice of services which include LM 79 Testing, Safety Testing, Electrical Testing, IEC/EN/IS/BS/ISO Testing, IP testing as per IEC 60529 and Cable Gland Testing.
ITCIndia Laboratory has been awarded accreditation by the NABL under the Energy Efficient Lighting Products Program. This includes LM-79 accreditation for Solid State Lighting Luminaires – Total Flux Measurements (Luminous Efficacy) and Solid State Lighting Luminaires –Luminous Intensity Measurements.
Our accreditation also includes IES LM-80:2008 for Solid State Lighting Luminaires-Lumen Maintenance (SSL Life Tests).
ITCIndia laboratory is also on the LED Lighting Facts Approved Labs List.
ITCIndia can do safety testing against below international standard like
IEC 61010-1 : lab instruments
IEC 60204-1 : COntrol panel
IEC 60595 : LED luminary
IEC 61347 : Lamp control gear
IEC 60950 : Information technology equipments
IEC 60601 : Electromedical equipmets
IEC 60065 : Audio video & similar product
IEC 61439 : Low voltage switchgear & control gear assemblies
IEC 60034 : rotating electrical machine and more contact us for more information…
LM-79 Definition and Scope
IES LM-79 is an approved method for testing electrical and photometric measurements of solid-state lighting products. LM-79 contains procedures for performing reproducible measurements of LEDs properties, including: total flux, electrical power, efficacy and chromaticity.
The scope of LM-79 applies to LED products that incorporate control electronics and heat sinks. This covers complete LED luminaires and integrated LED sources. It does not include bare LED chips or LED based products without a light source.
LM-79 testing requires complete luminaire testing on an absolute photometric basis. Typically lighting products are evaluated on a relative photometric basis, where separate tests are done for lamps an luminaires. However, for solid state lighting products the LED lamps typically cannot be separated from their luminaires. The absolute photometric testing required measures the light distribution and light intensity of the complete luminaire.
LM-79 Procedures and Conditions
Ambient Conditions
Maintain temperature at 25 degrees C +/-1 degree C (within 1M)
Mounting – limit thermal transfer
Limited air flow
Power Supply
AC waveshape limit to harmonic RMS of 3%
Voltage regulation to +/- 2%
Seasoning and Stabilization
Testing Orientation
Electrical Settings
Instrumentation
LM-79 Testing Methods
Integrating sphere systems are used to measure the total luminous flux and color for LM-79. This can be performed with a photometer (total luminous flux) or a spectral radiometer (spectral radiant flux). Utilizing a spectral radiometer and integrating sphere is the preferred method, which derives total luminous flux and color qualities form spectral radiant flux measurements.
Goniophotometer systems are also used for LM-79 testing to measure luminous intensity distribution. The Goniophotometer system tests derive total luminous flux and provide color characteristics including CCT and CRI.
LM-79 Test Outputs and Calculations
Total Luminous Flux
Luminous Intensity Distribution
Electrical Power
Luminous Efficacy
Chromaticity
CCT
CRI
For your better understanding, we are going to show you the LM-79 test report of latest LED in the following:
If you’re Buyers Demanding for LM-79 Testing for LED Lights– Contact Now!
Wish this blog post will be help. If you have any other questions, please feel free to contact us. ITCIndia team looking forward work with you and get better together!
Lm-79 Testing Laboratory for LED Solar Lights in India
ITCIndia is One of the Best LM-79 Testing Laboratory in India. Contact Now! And fulfill your testing Requirements for Tenders and etc.
If you are looking for LM-79 Testing Laboratory for your LED Solar Lights, ITCIndia Can Do. ITC India NABL Accredited Electrical Safety testing Laboratory Providing LM-79 Testing for your LED Solar Lights,
Testing parameter under LM 79 testing for LED Solar Lights:
Measurement of Total Luminous Flux & Luminous Efficacy
Color Characteristics (Chromaticity Coordinates, Correlated Color Temperature & Color Rendering Index)
Light Intensity Distribution Test.
Voltage, current, wattage, Power factor
The Testing to be conducted is as follows:-
PRODUCT: Solar Street Light | Testing as per standard:
Test to be conducted under LM 79:
a. Measurement of Total Luminous Flux
& Luminous Efficacy
b. Color Characteristics (Chromaticity
C.Coordinates, Correlated Color
Temperature & Color Rendering Index)
If you want details and quotations for Lm-79 Testing, Kindly send us the following details:
ITCIndia specializes in the measurement of Solid State Lighting per IES standards including NABL accredited LM-79 luminaire testing. ITCIndia laboratory is NABL Approved LM-79 Luminaire Testing, LM-79 Luminaire Testing for ENERGY STAR® for SSL, and is accredited to provide test and measurement under ISO 17025.
ITC India NABL approved Testing Laboratory (with Certificate No. T 1811 attached herewith) with specialization to test against EN and IEC standards for electrical safety leading to CE/NIST/IEC certification. Our Lab is fully equipped with high accuracy measuring testing Instruments and trained personal to provide testing & certification services for different type of products according to IEC Standards. Some of which are IEC 60335–1, IEC 60601, IEC 61010, IEC 60204, IEC 60598, IEC 60950, IEC 61427, BS EN 50262, etc…..
The laboratory is following the procedure as required by International Standard IEC/ISO 17025 and is already certified for IEC/ISO 17025 by NABL.ITC INDIA performing ELECTRICAL SAFETY TESTING for the following: EMC/EMI Testing Machinery Testing Luminaries and Lightning Testing Electro Medical Equipments Testing Laboratory Equipment Testing Household Appliances Testing IT and Telecom Equipment Testing Environmental Testing Battery Testing. LM 79
ITCIndia’s LM-79 luminaire and lamp testing fully evaluates the assembled luminaire for total flux, electrical power, efficacy (lm/watt), chromaticity, and angular distribution of light.
ITCIndia provides LM-79 luminaire and lamp testing reports for:
ITCIndia testing facilities are equipped with multiple type-c moving mirror color goniophotometers and integrating spheres up to 3 meters in diameter – ideal for testing large troffers and LED street lights.
ITCIndia laboratory features both a Type A and Type C Goniometer for testing a wide variety of luminaires.
LM-79-08. It is the Illuminating Engineering Society of North America (IESNA) approved method for the Electrical and Photometric Measurements of Solid-State Lighting. It measures an LED luminaire or integral lamp as a whole system according to a standard process using specified equipment.
IES LM-79 Electrical and Photometric Measurements of Solid-State Lighting Products
Approved method describing procedures and precautions in performing reproducible measurements of LED Lights:
Total luminous flux
Electrical powers
Luminous Intensity distribution
Efficacy (lm/watt)
Chromaticity
LM-79 Luminaire Testing 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.
Kindly send us the following Details, So that we can provide you quotation for the same:
Product Name, Technical Specifications and Brochure
Information about Federal and State LED Lighting Programs and Resources.
Call us at 8196980555 or email [email protected] for price information or an immediate quote today.
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If you have any query regarding LM 79 Testing, Kindly send us your testing requirements with the product technical details to submit you our testing charges.
We are waiting for your earliest reply. You can call or write us for any clarification
ITC INDIA provide testing against LM 79 – Approved Method for the Electrical and Photometric Testing of Solid-State Lighting Devices. Our lab is totally equipped with following high accuracy testing instruments to provide a total testing solution for LED based product
High Precision CCD Spectroradiometer
Digital Power Meter (RS-232 Model)
Digital CC and CV DC Power Supply
Integrating Sphere (Diameter=2.0M)
Standard Light Source (24V/50W)
LED Power Driver Tester
LM-79 Test report Contains:
Total luminous flux
Electrical power
Luminious Efficacy
Chromaticity
CCT, CRI
If you have any query regarding LM-79 Testing and Certification. Kindly send us your testing requirements with the product technical details to submit you our testing charges.
We are waiting for your earliest reply.You can call or write us for any clarification
