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Lamp Life Test
LM-84 lamp life test is a standardized testing method used to evaluate the luminous flux maintenance rate of LED lamps, aiming to predict the life of LED lamps through long-term test data. The following is a detailed explanation about the life test of LM-84 lighting fixtures:
Overview of LM-84
Full name: LM-84《Approved Method: Measuring Luminous Flux and Color Maintenance of LED Packages, Arrays, and Modules》。
Publisher: Illuminating Engineering Society of America (IES).
Purpose: To evaluate the luminous flux maintenance rate and color stability of LED lamps through long-term testing data.
2. Testing principle
Luminous flux maintenance rate: The luminous flux of LED lamps gradually decreases with increasing usage time.
Test time: At least 6000 hours of luminous flux attenuation data.
Test conditions: Conduct a lifespan test under rated conditions and record the changes in luminous flux over time.
3. Main testing items
(1) Luminous flux
Definition: The total amount of light emitted by a lamp, measured in lumens (lm).
Test method: Use an integrating sphere and a photometer to measure the luminous flux of the lamp.
(2) Luminous flux maintenance rate
Definition: The ratio of the luminous flux of a lamp at different time points to the initial luminous flux.
Test method: Regularly measure the luminous flux of the lamp and calculate the luminous flux maintenance rate.
(3) Color stability
Definition: The changes in color temperature and color rendering index of a lighting fixture at different time points.
Test method: Use a colorimeter to measure the color temperature and color rendering index of the lighting fixture.
4. Testing equipment
Integral sphere: used for measuring luminous flux.
Photometer: used to measure light output.
Colorimeter: used to measure color temperature and color rendering index.
Lifetime testing equipment: used for long-term monitoring of the luminous flux and color stability of lighting fixtures.
5. Corporate Responsibility
(1) Product Design
Optimize the design of LED lighting fixtures to improve luminous flux maintenance and color stability.
Choose high-quality LED chips and driver circuits to reduce light flux attenuation and color drift.
(2) Compliance testing
Ensure product compliance with relevant standards through LM-84 lifespan testing.
Prepare complete technical documents, including test reports, design drawings, etc.
(3) Labels and identification
Mark the luminous flux maintenance rate and lifespan prediction results on the product.
Provide instructions for use, including applicable conditions, safety precautions, etc.
6. Summary
LM-84 lamp life testing is a standardized testing method used to evaluate the luminous flux maintenance rate and color stability of LED lamps, predicting the life of LED lamps through long-term test data. Enterprises need to optimize product design, ensure product compliance with relevant standards through LM-84 life testing, fulfill compliance responsibilities, and enhance product quality and market competitiveness.
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