Photometry Product Testing

Classic Lab India can do Electrical Safety testing against Luminaries/LED equipment for following types of products/standards:

Fixed general purpose luminaries, Luminaries for road and street lighting, Aquarium luminaries, Lighting chains, Emergency lighting.

LED-lamps, LED bulb, LED based street lights, flood lights, tube lights, DC or AC supplied electronic control gear for LED modules, Indoor-outdoor LED luminaires etc

Popular standards for LED Product testing are LM 79, IS 16106:2012, IEC 61347-2-13, IEC 62384, IEC62722-2-1, IEC 62031, IS 15885(part2/sec13), IS 16103, IS 16102, IEC 62612, IEC 60969 etc

General Safety Testing for Luminaries



External and internal wiring

Provision for Earthing

Protection against electric c shock

Resistance to Dust, Solid objective and Moisture

Insulation Resistance and electric Strength

Creepage and Clearances distances

Endurance and Thermal Test

Resistance to Heat ,Fire and Tracking

Screw Terminals

Screwless terminals and Electrical Connections

LM-79 Testing Laboratory in India
Classic Lab is a accredited laboratory through NABL under photometry testing providing LM-79 Testing. It has a scope to test Solid state lightning luminaries for total luminous flux, efficacy, CCT, CRI, color coordinates and LID.

LED’s are boon to this contemporary epoch. It is widely used because of its innumerable merits. Let us have a brief look at LED’s expediency to move further to discuss about the Testing of luminaries as per LM 79.

We can do the testing of your LED product against the different standard like LM 79 testing, IS 16106, IEC 60598-1, IEC 61347-2-13, IEC 62384, IEC62722-2-1, IEC 62031, IS 15885(part2/sec13), IS 16103, IS 16102, IEC 62612, and IEC 60969 etc

First and foremost reason is its lastingness that is approximately 7 years for continuous use at day and night. Another reason is the energy efficiency. LED is efficient to convert 90 % of electrical energy to light energy with a little wastage in the form of heat energy produced during operation. These are pocket friendly and give you relief while paying your electricity bill. Apart from it, is the durability. The use of Semiconductors in LED make it more durable as compared to Filament or neon gas lights. LED have the ability to resist high temp, jolt. Besides, LED are environment friendly and safe to use. Because they are free from toxic chemicals and can be totally recycled.

In future LED is going to substitute incandescent lamp totally due to its list of benefits. All industry and residential lightning is convinced to this technology and are implementing it by replacing incandescent lamp with the LED. So, LED has a excellent future ahead.

Why to go for LM-79 Testing?
If You are a manufacturer or vendor and want to sell your product in the market. Then you must be needed a test report of your product which will give all the parameters electrical and photometric measurement issued by an NABL accredited laboratory. LM 79 testing will give you a chance to improve your product by amendment in it if required. So, Testing LED luminaries are a necessary task to be performed in this competitive world.

Is it Compulsory to go for LM 79 Testing for Luminaries?
Of course Yes! You have to Go for LM 79 Testing, even on the usage of Tested LED in your luminary. The LED’s are tested according to LM 80 which is a standard to test only LED’s. But in Luminaries , LED is one of the components used in luminaries. The other components of luminary are electrical, some connections, LED’s, optical, thermal and mechanical that make it a new product and requires testing as per LM-79 Testing which is a standard to test SSL and test the LED luminaries for measurements. To be competitive and for good business, you need to test your product as per LM 79, as most of the purchaser requires a test report and prefer to purchase Tested luminaries only.

Now, it is clear LM 79 testing has a positive impact on the product. In brief, improvement can be expected, quality enhancement, real picture performance criteria of the product, help in enhancing business.

Scope of LM-79 Testing
What does it cover and what it does not cover?

It covers the LED based Solid state lighting (SSL) goods with control electronics and heat sinks incorporated, that is, those devices that requires only AC main power or a DC voltage power supply to operate. SSL products in the form of luminaries (fixtures incorporated light source) are covered in LM-79 Testing. This standard describes the test methods for individual SSL products.

It does not cover SSL products that require external operating circuits and external heat sinks such as LED chips, LED packages and LED module. Even this document does not cover the fixtures designed for SSL products sold without a light source and the performance rating of the product.

Who can perform LM 79 testing and what does it provides?
LM-79 Testing can be performed by laboratories (Classic Lab India ) which are accredited through NABL and having their scope in testing because only issued report from such labs is relevant .

LM-79 Testing provides us with the following parameters:

1. Electric parameters: Input Voltage, power, current, power factor, frequency

2. Photometry parameters: Luminous flux, Luminous Efficacy, Radiant power

3. CIE colorimetric parameters: chromaticity coordinates(x), chromaticity coordinates(y), chromaticity coordinates(u’), chromaticity coordinates(v), chromaticity coordinates(v’), Correlated color temperature(Tc), DUV Value, color rendering Index(Ra)

4. Light Intensity Distribution

It will be interesting to know about the approved method of LM-79 Testing. For photometric parameters Integrating sphere is required and for Light intensity distribution Goniophotometer is needed. A lab having both the machines and valid accreditation with full scope has authority to issue Test reports presenting all the parameters present in the report discussed above.

Approved Method to do LM 79 testing:
Procedure and conditions.
Maintained ambient temperature is 25°±1 °C with limited air flow.
Power supply AC waveshape limit to harmonic RMS of 3%.
Voltage regulation to ±2 %.
Seasoning and stabilization (discussed below).
Testing orientation.
Electrical setting.
All above are discussed below in detail.

The total luminous flux (lumen) of SSL products shall be measured using an Integrating sphere or a goniophotometer. The method may be chosen depends upon what is needed to be measured.

For Small sized LED luminaries the total flux and color measurements can be measured in Integrating Sphere. There is no need of the dark room for installing Integrated sphere.

The method of mounting can be the primary path for heat flow away from the device and can affect measurements results significantly. The SSL under test must be mounted in integrating sphere so that heat conditions through supporting objects causes negligible cooling effect. Te product may be held by support materials that has low heat conductivity like Teflon. Even the supporting device does not disturb the air flow around the product. If any support is provided with the SSL, then the product shall be tested with support structure attached.

The SSL product under test shall be operated at rated voltage (AC/DC) according to the specification of SSL. If the product has dimmable capability, measurements shall be performed at maximum input power condition. If the product has multiple modes of operations including variable CCT, measurement may be made at different mode of operation if necessary, and such setting conditions shall be clearly reported. The integrated sphere owned by the Classic Lab India India pvt is having a spectro-radiometer.

LM-79 Testing with integrating sphere system: First of all the size of integrating sphere should be large enough to ensure that the measurements errors due to the effect of baffle and self absorption. Classic Lab India has Integrating sphere with dia 2 m. The integrating sphere shall be equipped with auxiliary lamp (quartz halogen lamp) for self absorption factor. Before operating the integrating sphere must be calibrated against the reference standard lamp calibrated for total spectral radiant flux. No seasoning is required for new SSL products. Before measurements are taken, the SSL product under test shall be operated long enough to reach stabilization and temperature equilibrium. The time required for stabilization depends on the type of SSL product under test. The time ranges from 30 min to 2 or more hours for large SSL. The ambient temperature is maintained. The stabilization is judged when variation ( max- min) of at least 3 reading of the light output and electrical power over a period of 30 min, taken 15 min apart, is less than 0.5 %. Even the stabilization time used for each SSL must be reported.

The software generates the Lm-79 Testing report providing all the parameters: total luminous flux, CCT, CRI, color coordinates discussed above except the light intensity distribution (LID).

LM-79 Testing with Goniophotometer system: Now ,For LID measurements goniophotometer is required, which is generally used for relatively large size SSL products. It also provides the total luminous flux in lumen as well. Dark room is required for installation of Goniophotometer with temperature control. Working on goniophotometer is time consuming as compared to Integrating sphere.

The LM-79 Testing report generated in Goniophotometer will provides all parameters including LID.

For reference a full report with all the parameters issued by Classic Lab India India Pvt Ltd is attached. Kindly have a look for clarity.

Who can perform LM 80 Testing?
The recognized laboratory is authorized to do the LM 80 testing, as reports issued by such laboratories are valid. Classic Lab India india pvt located in panchkula is a authorized laboratory, who has the facility for LM 80. Competent engineer with well equipped lab is here to provide you the best service. Just visit us at www.Classic Lab for more details and have a look at the scope too

What is LM 80?
This is an approved method, which covers the measurement of Lumen maintenance of inorganic LED based package, arrays and module. Lumen maintenance is a characteristic measured under controlled conditions. Performance in a particular application may be different. This method does not provide guidance or make any recommendation regarding predictive estimations or extrapolation for Lumen maintenance beyond the limits of the lumen maintenance determined from actual measurements.

What does LM 80 covers?
It is a method to measure the Lumen depreciation of Solid state light source, array and module.


  • Battery Testing
  • Cable Gland Testing
  • Cable Tray Testing
  • Calibrating a UV intensity Meter
  • Corrosion Testing
  • Electrical Motor Testing
  • Electrical safety Testing for Lighting products
  • Electrical Safety Testing for Medical Devices
  • Electrical Safety Testing of Electromedical Equipment
  • Electrical Testing
  • Electrical Testing for Automotive Components
  • Electronic Testing
  • EMC Testing
  • EMC/EMI Testing
  • Environmental Testing
  • Household Equipment – Consumer Product Testing
  • Household Equipment Testing
  • IEC 60204-1
  • Safety of Machinery Testing
  • IEC 60204-1 Testing
  • IEC 60601 Testing
  • IEC 60884-1 Plugs and Socket-
  • Outlets for Household and Similar Purpose
  • Information Technology Testing
  • IP Testing
  • LED Driver and
  • Lamp Control Gear Testing
  • LED OT Light Testing
  • LM 80 Testing
  • LM-79 Testing
  • Luminaries/LED Product Testing
  • Equipment Testing
  • Mechanical testing
  • Medical Bed Testing
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  • Mixer Grinder Testing
  • Mixing and Stirring Laboratory
  • Equipment Testing as per Standard
  • IEC 61010-2-051
  • Nerve and Muscle Stimulator Testing as per IEC 60601-2-10
  • Packaging Testing for Transportation of Lithium ion Batteries
  • Patient Monitor testing IS 13450
  • PART 2 SEC 49/
  • IEC 80601-2-49/ISO 80601-2-49
  • Photometry Testing
  • Photovoltatc (PV) Modules Testing
  • Refrigerator Testing
  • RoHS Testing
  • Room Heater Testing
  • Safety Testing for Face
  • Shield/Mask/Respirators Mask
  • Sensor Testing as per Standard IEC 60751
  • Software Testing
  • Solar Fence Energizer Testing
  • Testing of Commercial Refrigerators & Freezers 60035-2-24
  • Testing of Automatic Sanitizer Dispenser/Soap Dispenser as per IEC 60335-1
  • Testing of Electric Food Mixers & Grinders IS 4250
  • Testing of Vertical Road signs – EN 12966 – Variable Message Signs
  • Usability Testing of Medical Devices – IEC 62366
  • UV Testing: Testing of UV light Bulbs
  • Ventilator testing Lab as per: ISO 80601-2-12:2020
  • Vibration Testing

S. No


 IS /IEC Standards


 Methods of Measurement of Lumen Maintenance of Solid-State Light (LED) Sources

 IS 16105 /   LM80-08


 Electrical and Photometric Measurements of Solid-State Lighting Products

 IS 16106/ IES   LM 79-08


 Method for the Electrical and Photometric   Measurement of General   Service  Incandescent   Filament Lamps

 IES LM-45


 Electrical and   Photometric   Measurements of Single-  Based Fluorescent Lamps

 IES LM-66


 Method for Photometry   of Reflector Type Lamps

 IES LM-20


 Photometric Testing Of   Indoor Luminaries Using   High-Intensity Discharge   Or  Incandescent Filament  Lamps

 IES LM-46


 Method For Photometric   Testing Of Indoor   Fluorescent Luminaires

 IES LM-41

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