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What is LM Testing?
LM Testing means using special testing methods made by the Illuminating Engineering Society (IES). These tests are used to check the performance and quality of LED lighting products.
LM Testing mainly includes:
- LM-79 Testing – Performance testing of finished LED luminaires
- LM-80 Testing – Lumen maintenance testing of LED packages and modules
These tests help verify whether an LED product delivers the claimed light output, efficiency, and lifetime.
LM-79 Testing (Photometric & Electrical Performance)
LM-79 Testing measures the actual performance of finished LED lamps and luminaires under controlled conditions.
LM-79 Testing Covers:
- Total luminous flux (lumens)
- Power consumption (watts)
- Luminous efficacy (lm/W)
- Color temperature (CCT)
- Color rendering index (CRI)
- Spectral data and chromaticity
- Light distribution and IES photometric files
LM-79 Test Reports are commonly required for:
- Government and private tenders
- Export documentation
- Product datasheets and catalogs
- Energy efficiency and performance claims
LM-80 Testing (Lumen Maintenance & Lifetime)
LM-80 Testing evaluates how LED light output degrades over time.
It is performed on LED packages, modules, or arrays, not on finished luminaires.
LM-80 Testing Covers:
- Lumen maintenance over long test durations
- Performance at different operating temperatures
- Stability of LED light output
LM-80 data is often used with TM-21 calculations to estimate LED lifetime (L70 / L80 / L90 values).
LM-80 Testing is mainly required for:
- LED manufacturers
- Long-life performance claims
- Export and energy program compliance
Why is LM Testing Important?
LM Testing is important because it shows whether an LED light is strong, safe, and energy-saving. It helps buyers and companies know that the light gives correct brightness and works well for a long time.
LM Testing is important because it:
- Verifies actual LED performance and efficiency
- Supports technical and marketing claims
- Is required for many tenders and export markets
- Helps meet buyer and certification requirements
- Improves product credibility and acceptance
- Reduces risk of rejection and disputes
Point | Why LM Testing is Important |
Product Safety | It makes sure LED lights are safe to use. |
True Performance | It checks if the light gives the same brightness it promises. |
Energy Saving | It helps confirm that the light uses less energy. |
Long Life | It shows how long the LED light can work properly. |
Buyer Trust | It helps customers trust the product. |
Required for Approval | It is needed for tenders, exports, and certificates. |
Reduces Risk | It helps avoid product failure and complaints. |
Products Requiring LM Testing
LM Testing follows IES standards such as LM-79 and LM-80. These standards explain how lights should be tested so that results are correct, fair, and trusted by buyers and authorities.
LM Testing is conducted according to internationally accepted standards, including:
- IES LM-79 – Electrical and photometric measurements
- IES LM-80 – Lumen maintenance testing
- TM-21 – Lifetime projection calculations
- Buyer-specific and energy program requirements
LM Testing Process – Step by Step
Step 1: Requirement & Scope Finalization
LM-79, LM-80, or combined testing scope is finalized based on product and market needs.
Step 2: Sample Submission
Representative LED samples are submitted along with technical specifications.
Step 3: Laboratory Testing
Testing is conducted using calibrated photometric equipment under controlled conditions.
Step 4: Data Analysis
Test results are reviewed and validated by qualified engineers.
Step 5: Test Report Issuance
Final LM Test Reports are issued by accredited laboratories.
Documents Required for LM Testing
For LM Testing, companies must provide product details, light specifications, technical drawings, driver details, and previous test reports (if any). These documents help the lab understand and test the product properly.
- Product datasheet and specifications
- LED component details (for LM-80)
- Bill of Materials (BOM)
- Sample identification details
- Manufacturer or brand information
LM Testing Turnaround Time
- LM-79 Testing: 3–7 working days
- LM-80 Testing: Long-term testing (6,000 hours or more, as applicable)
Timelines depend on product type and testing scope.
Cost of LM Testing of LM Testing
The cost of LM Testing depends on the type of light, number of tests, and lab requirements. Simple products cost less, while larger or complex lights may cost more.
LM Testing cost depends on:
- Type of test (LM-79 / LM-80)
- Product complexity
- Number of samples
- Reporting requirements
Indicative Cost Range:
₹10,000 to ₹40,000+ (LM-79)
LM-80 cost varies due to long-duration testing.
LM Test Report vs Lifetime Claim
- LM Test Report provides measured performance data
- Lifetime claims must be supported by LM-80 data and TM-21 projections
Accurate testing helps avoid misleading claims and compliance issues.
Why Choose JS Certification Services for LM Testing?
Choose JS Certification Services because we give expert guidance, trusted lab support, help with documents, and smooth testing coordination. Our team makes the LM Testing process easy, fast, and professional.
- Coordination with NABL-accredited LM testing laboratories
- Correct test selection (LM-79 / LM-80 / TM-21)
- Support for tenders, exports, and certifications
- Fast coordination and transparent process
- Affordable and professional consultancy support
We ensure your LED products meet performance and compliance expectations.
FAQ
A reassuring message that focuses on clarity and understanding.
It shows a commitment to answering every question with care, one step at a time.
It is required for most tenders, exports, and performance verification.
LM-80 applies to LED components, not finished luminaires.
Reports are issued by accredited testing laboratories.
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