Issued by: Guangdong China Inspection and Testing Co., Ltd, holding authoritative qualifications including CMA, CNAS, ISO/IEC17020, ISO9001, providing integrated service of on-site inspection, sample sealing & laboratory testing. |
Sampling Rules
Follow GB/T2828.1-2012 (equivalent to ANSI/ASQ Z1.4), General Inspection Level-II, random sampling. Destructive tests such as drop-test sampled as required. If calculated sample size exceeds total lot quantity, perform 100% inspection.
Defect Levels
1. Critical Defect (Zero Tolerance,AQL=0): Sharp flash / burr, penetrating crack on housing / lampshade, broken glass shade, cracked driver housing, power-cord insulation broken with exposed conductor, bare copper wire at terminal, burnt-carbonized terminal; live metal exposed on lamp-holder; live exposed earth-related metal for Class-Ⅰ lamp. Even one defective unit → full-batch rejection, shipment prohibited.
2. Major Defect (AQL=2.5): Large-area paint / plating peeling, multiple burnt-out LED beads; loose lamp-holder, exposed non-live metal of lamp-holder; missing / loose earth-terminal for Class-Ⅰ lamp; lampshade easy to fall-off, severely deformed mounting bracket, missing power-cord strain-relief, adjustable joint self-dropping, power-cord with sharp kink damage; lamp total failure, partial LED dead-bead, dimming / remote-control main-function failure, obvious severe flicker visible to naked-eye, glass / housing crack after packaged drop-test, missing nameplate / earth symbol / 3C mark / mandatory safety warning. Reject batch if over-limit, re-inspection after rework.
3. Minor Defect (AQL=4.0): Harmless tiny flash, minor scratch, tiny paint-spot defect, slight color difference, occasional remote-control key mis-response, minor carton dent. Acceptable within allowed quantity, process improvement required.
1 Inspection Workflow
1. Check outer carton, shipping mark and PO documents.
2. Inspect color box, foam inner packing, manual and warning label; check power-cord for sharp kink damage.
3. Count full-set accessories including lamp-body, lampshade, LED module / bulb, driver, mounting bracket and hardware.
4. Visual inspection: lamp housing, coating finish, PC / glass lampshade, LED board, driver, wiring & terminal, lamp-holder; earth-terminal check for Class-Ⅰ lamp.
5. Dimension measurement: overall size, lamp-panel diameter, mounting-hole spacing.
6. Assembly check: lampshade locking, mounting bracket, terminal crimping, power-cord strain-relief test(5-10N pull), adjustable joint performance; earth-terminal assembly check for Class-Ⅰ lamp.
7. On-site power-on functional screening: lighting-up test, dimming / color-change / segment function, remote-control test, visual flicker spot-check; packaged drop-test spot-check. Cut-off power once sparking / burnt smell occurs.
8. Verify nameplate, earth symbol(for Class-Ⅰ lamp), 3C mark(for China-market units) and safety warnings in user manual.
9. Count defects, take photos, judge accept / reject and generate inspection report.
10. Provide Container Loading Supervision service upon request.
2 Key Inspection Items
Visual Inspection
- No sharp flash / burr; no penetrating crack on housing / lampshade; glass shade without crack or chipping.
- No exposed copper wire or carbon-burnt terminal; power-cord intact without sharp kink.
- Lamp-holder without loose; Class-Ⅰ lamp earth-terminal shall not be missing or loose.
- LED bead without mass burn-out; driver housing free of penetrating crack.
Dimension & Assembly
Measure overall dimension, lamp-panel size and mounting-hole spacing vs approved sample. Check lampshade locking condition, bracket deformation, terminal crimp quality, power-cord strain-relief(5-10N pull test), adjustable joint positioning performance; check earth-terminal assembly for Class-Ⅰ lamp.
On-site Functional Screening
1. Lighting-Up Test: Lamp lights-up normally; no total lighting failure.
2. Dimming / Color-Change / Segment Test: Smooth function switching if equipped.
3. Remote-Control Test: Remote-control responds correctly to each command.
4. Visual Flicker Spot-Check: No obvious severe flicker visible to naked-eye. Only rough screening, lab test for final judgement.
5. Packaged Drop-Spot-Check: Test with full original package, select 2-3 weak sides; no glass breakage or housing / lampshade rupture.
Marking & Manual
Nameplate marked with model, rated voltage & power; Class-Ⅰ lamp shall be marked with earth symbol. China-market goods with 3C logo. User manual includes installation safety warning: professional-install-reminder, no covering warning. Mandatory translated warning for export orders.
3 Defect Classification
- Critical Defect: Sharp burr, penetrating crack, broken glass shade, exposed conductor, burnt terminal, live metal exposed on lamp-holder, live exposed earth-related metal(Class-Ⅰ lamp). One found → full-batch rejection.
- Major Defect: Large-area coating peeling, multiple burnt LED beads, abnormal lamp-holder, missing / loose earth-terminal(Class-Ⅰ lamp), loose lampshade, deformed bracket, missing strain-relief, bad power-cord kink, adjustable-joint failure, main-function failure, obvious flicker, breakage after drop-test, missing earth-symbol / 3C / safety warning. Reject batch if over-limit, full rework required.
- Minor Defect: Tiny harmless flash, minor scratch, tiny paint spot, slight color difference, occasional remote-control mis-response, slight carton dent. Allowed for release within AQL limit, continuous process improvement required.
4 Conclusion
Household lamps & luminaires bring multiple risks including mechanical cutting hazard, electrical-safety & fire risk, glass-fragment injury risk and earth-connection safety risk for Class-Ⅰ lamps. Guangdong China Inspection and Testing Co., Ltd delivers comprehensive Inspection Service, covering Product Inspection Service, Pre-production inspection, Container Loading Supervision, Pre-Shipment Inspection in China and general China quality inspection. With full qualification system of CMA、CNAS、ISO/IEC17020、ISO9001, to guarantee impartial inspection procedure and credible inspection reports. This standard can be referenced by local and overseas Inspection Company, Quality Inspection Company for bulk-shipment quality risk mitigation.
