Guide to Inspection Methods and Steps for Lighting Equipment - Inspection and Audit Services for Factories

October 15, 2025

Lighting fixtures, as an important product for daily lighting, their quality and safety directly affect the life and property safety of users. During the inspection, factory verification, and product inspection and certification processes of lighting fixtures, a strict quality control system must be established. This article will systematically elaborate on the inspection standards, inspection methods, and quality certification requirements for lighting fixtures, providing professional technical guidance for relevant practitioners.
I. Requirements for Inspection and Certification of Lighting Fixture Foundations
(1) Certification Standards for Packaging Materials
Outer packaging certification requirements
Material standard: Five-layer double B corrugated board, with A side as the inner layer and B side as the outer layer for export packaging.
Color box certification: The processes such as laminating and varnishing meet the requirements stipulated in the contract.
Material verification: Whiteboard paper, single E corrugated, double E corrugated will be inspected according to the contract.
Product classification certification
Lamp types: Outdoor lamps, floodlights, garden lamps, indoor lamps, etc.
Material certification: Verification of materials such as aluminum casting, copper casting, and stainless steel.
Procurement Confirmation: Confirm production requirements with the factory before signing the contract.
(2) Aluminum die-casting lamp certification
Appearance quality certification
Size and weight: Meets the specification requirements. The surface is smooth and free of scratches.
Color consistency: Meets the requirements of the contract and there is no peeling phenomenon.
Protection level: Meets the IP level certification stipulated in the contract
Structural Safety Certification
Component fit: All components fit well, with no burrs or rough edges.
Screw standard: Use national standard screws. The exposed parts are made of stainless steel.
Grounding safety: The grounding path is in good condition. A large toothed pad is used to pierce through the paint layer.
Electrical Safety Certification
Cable specification: Use silicone wire assembly, and the wire diameter meets the requirements.
Color identification: L represents brown/red, N represents blue, and grounding is indicated by the yellow and green combination.
Safety test: Certified through power-on test and high-voltage test.
II. Special Certification for Plastic Lamps
(1) Material Quality Certification
Lampshade Quality Certification
Material grade: ABC, PC, Acrylic material certification
Surface quality: Smooth and free of scratches, transparency meets the requirements.
Complete structure: The dimensions match, and the feed holes are not noticeable.
Base quality certification
Matching performance: Perfectly matches the lampshade
Structural strength: There is no cracking at the screw installation area.
Appearance quality: Uniform color, no scratches or defects
(2) Electrical Component Certification
Electrical Board Certification
Process requirements: No dust or fingerprints, accurate hole positions
Identification standard: There is a clear identification at the entry point.
Thickness standard: Meets the requirements of the contract
Cable Safety Certification
Wire diameter standard: Meets the power requirements of the lamps
Color specification: Wire according to the standard requirements
Emergency power supply: Installed securely and with proper wiring.
III. Lighting Fixture Inspection and Certification Standards System
(1) Surface Treatment Certification
Electroplating Quality Certification
Color uniformity: There is no significant color difference, and it is close to the mirror-like brightness.
Surface integrity: Free from scratches, sand particles, pinholes, etc.
Adhesion test: Passed the strict adhesion certification
Paint finish quality certification
Color consistency: The overall color is uniform and there is no color variation.
Coating quality: No paint leakage, peeling or blistering occurred.
Durability test: conducted through hardness and adhesion tests
(2) Structural Safety Certification
Dimensional Accuracy Certification
Tolerance control: Dimensional error of the lamp body ±1/2 inch
Part integrity: Meets the requirements of the engineering part list.
Assembly quality: The structure is firmly fastened, with no looseness.
Load-bearing safety certification
Chain strength: Capable of withstanding sufficient weight
Ground wire conduction: Conductivity test of the ground wire is performed
Structurally stable: No warping or distortion occurs.
IV. Safety Performance Certification System
(1) Electrical Safety Certification
High Voltage Test Certification
100% Test: Each product undergoes a high-pressure test.
Polarity test: Ensure the polarity is correct
Conduction test: The circuit conducts electricity normally.
Component Safety Certification
Light bulb quality: The material is correct and there is no damage.
Fragment performance: Good elasticity, no oxidation
Wire specification: No cracks, durable printed characters
(2) Function and Performance Certification
Switch Function Certification
Operational performance: When the switch is pulled, there is a sound but it does not return to its original position.
The circuit is correct: The positive pole passes through the switch.
Functional test: Conduct the lighting test
Cable specification certification
Specification compliance: The wire diameter is determined based on the power.
Length standard: Meets customer requirements
Color matching: Coordinated with the color of the lamp body
V. Component Quality Certification
(1) Glass Component Certification
Quality Integrity Certification
Specification accuracy: The materials and thickness meet the requirements.
Surface quality: No cracks, scratches or missing corners.
Process requirements: The sandblasting should be uniform, without any pits or black spots.
Safety performance certification
Edge treatment: No sharp edges or cuts.
Packaging protection: The inner box provides adequate protection.
Inspection standard: According to the glass quality inspection operation manual
(2) Label Identification Certification
Durability Certification
Waterproof test: When wiping the cotton fabric with water for 15 seconds, there is no blurring.
Viscosity test: No rolling off or detachment occurred.
Material certification: Fireproof, waterproof self-adhesive material
Information Accuracy Verification
Final translation: Model and specifications are error-free.
Position accuracy: Proper paste location
Printing quality: Clear and without any double images.
VI. Packaging and Transportation Certification
(1) Component Package Certification
Packaging Safety Certification
Bag specification: Printed with warning message, with ventilation holes
Content complete: No missing or incorrect installation of parts.
Specification quality: Language is correct, printing is clear.
(2) Outer Packaging Certification
Material Strength Certification
Paper standard: Meets the specified material requirements
Drop test: Passed the transportation drop test
Structural design: The wiring is precise and the closure is tight.
Identification information verification
Printed content: The front and back labels information is accurate.
Barcode: Identified through scanning
Warning sign: Complete with fragile marking and direction signs
VII. Inspection and Certification Process Management
(1) Inspection Environment Certification
Inspection Condition Standards
Lighting requirements: Appropriate lighting conditions
Testing tools: Complete testing equipment
Personnel qualifications: Have received professional training
(2) Sampling Inspection Certification
Sampling Plan Certification
Sampling standard: Follow the AQL standard.
Sample size: Representative
Testing method: A scientific testing procedure
Record Management Certification
Data record: Complete test data
Problem tracking: Detailed records of quality issues
Report Specification: Standard Inspection Report Format
VIII. Continuous Improvement of the Certification System
(1) Supplier Management Certification
Qualification Review Certification
Production qualification: Legal production license
Quality system: A comprehensive quality management system
Equipment capabilities: Advanced production inspection equipment
(2) Quality Traceability Certification
Traceability System Certification
Batch management: Comprehensive batch traceability
Material traceability: The source of raw materials can be traced.
Process Record: Complete Production Record
By establishing a complete inspection and certification system for lighting products and strictly implementing quality control throughout the entire process from raw materials to finished products, it is possible to effectively ensure the safety and quality of lighting products, provide consumers with safe and reliable lighting products, and at the same time promote the standardized development of the lighting industry.