ANSI/IES LM-79 Testing for LED Lighting Products

ANSI/IES LM-79 is an industry-approved method for testing and reporting the electrical and photometric performance of solid-state lighting (SSL) products like LED lamps, luminaires, and integrated systems. Developed by the Illuminating Engineering Society (IES), ANSI/IES LM-79 testing ensures accurate, repeatable performance data for lighting professionals, manufacturers, and regulators.

At Intertek, we provide ANSI/IES LM-79 testing services using advanced, accredited laboratories to help you prove product performance, demonstrate compliance, and meet  energy efficiency programs.

Whether you're targeting ENERGY STAR®, Design Lights Consortium(DLC), or California Title 20/24, Intertek helps you meet critical market requirements efficiently and reliably.

What Does ANSI/IES LM-79 Measure?

Intertek conducts ANSI/IES LM-79 testing under standard operating conditions using precision equipment like integrating spheres and goniophotometers. Core measurements include:

• Luminous Flux (Lumens): Total visible light output.
• Luminous Efficacy (Lumens/Watt): Energy efficiency performance.
• Correlated Color Temperature (CCT): Perceived color “warmth” or “coolness.”
• Color Rendering Index (CRI): Accuracy of color reproduction.
• Light Distribution: Beam angle, intensity patterns, and uniformity.
• Chromaticity Coordinates: Consistency and target accuracy in light color.
• Electrical Performance: Input power, voltage, and power factor.

Why ANSI/IES LM-79 Testing Matters

• Regulatory Approvals: Meet requirements for ENERGY STAR®, DLC, and global efficiency programs.
• Consumer & Specifier Confidence: Provide accurate data for lighting designers, engineers, and end-users, adhering to FTC Lighting Facts label requirements.
• Energy Efficiency Claims: Support green marketing with real performance data.
• Competitive Positioning: Differentiate with superior light quality, color fidelity, and output.

Why Choose Intertek for ANSI/IES LM-79?

• Fast, accurate testing in ISO/IEC 17025 accredited labs
• Advanced capabilities including integrating sphere and gonio photometric testing
• Complementary services: ANSI/IES LM-80 (lumen maintenance), photobiological safety (IEC 62471), EMC, cybersecurity, environmental and reliability testing
• Global market access support with North and South American, European, and APAC regulatory expertise

Whether you're launching a residential LED bulb or industrial high-bay lighting system, Intertek's ANSI/IES LM-79 testing supports your full product lifecycle—from R&D through certification.

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