An approved sample shows what a supplier can produce. A pre-shipment inspection should establish whether the finished order matches that approved configuration. For LED street lights, this means looking beyond a row of illuminated fixtures and checking the actual products, their measured performance, and the contents of the shipment.
The central question is not simply whether the lights work. It is whether the correct lights, with the correct components and settings, are ready to leave the factory. The following workflow provides a practical basis for making that decision.
Establish Exactly What the Shipment Must Contain
Start with the final purchase order, approved specification sheet, installation drawing, and any agreed changes. Check the product model, quantity, rated input voltage, power, color temperature, optical distribution, housing finish, mounting dimensions, and control options. Pre-shipment inspection should assess the goods against contractual requirements rather than a general product description.
Create a separate inspection entry for each configuration. For example, two street lights with identical housings may be ordered with different optics or dimming settings. Do not treat them as interchangeable simply because they look alike.
Define the inspection lot, sampling method, defect categories, and acceptance limits before checking the goods. Select inspection units from different carton positions and production groups rather than accepting only specially prepared demonstration units.
Examine Assembly Quality and Mounting Fit
With the power disconnected, inspect the housing, optical cover, mounting socket, fasteners, and accessible internal assembly. Look for cracked covers, damaged threads, loose components, sharp edges, pinched wires, and contamination inside the optical compartment.
Check practical installation details as well as appearance. Measure the mounting opening against the approved drawing, confirm that the adjustment mechanism moves correctly, and verify that the specified fixing hardware is present. Use the manufacturer’s prescribed tightening requirements rather than applying an arbitrary torque.
Record cosmetic defects separately from faults affecting installation or safety. Luminaire safety standards address mechanical construction, electrical construction, and marking; a clean exterior alone is not sufficient evidence of acceptable construction.
Verify Electrical Safety and Actual Input Power
Electrical testing should be performed by qualified personnel using suitable equipment and procedures. Review the applicable insulation and electrical-strength test records, together with protective-earth continuity where required by the luminaire’s protection class. Follow the standards and certification requirements applicable to the supplied design and destination market. A successful switch-on test does not establish electrical safety.
For performance checks, measure the complete luminaire at its supply input after stabilization. Record the supply voltage, actual input power, and specified electrical parameters using calibrated instruments. Do not substitute the driver’s maximum rated capacity for the measured consumption of the assembled light. Standardized LED measurement methods address electrical conditions, instrument calibration, operating settings, and stabilization.
Keep individual readings, not just a batch average. An acceptable average can conceal an individual unit outside the agreed limits.
Confirm Light Output and Optical Consistency
Where photometric sampling is included in the inspection plan, verify total luminous flux and the specified color characteristics using suitable laboratory measurements. Confirm that the installed optical system corresponds to the approved configuration and its photometric data.
A single illuminance reading beneath a lamp is not a substitute for measuring total output or light distribution. Methods such as ANSI/IES LM-79 address these quantities through controlled optical and electrical measurements.
For each tested unit, record its identification, optical configuration, operating setting, and result. Investigate any unexpected difference between units before approving the shipment. Avoid accepting a report that cannot be connected to the model and configuration actually being supplied..
Check Operating Behavior, Controls, and Burn-In Records
Include functional checks for every feature specified in the order. Where photocells or dimming controls are fitted, test their operation with the supplied configuration rather than checking the lamp only at full output. Confirm the required switching response, dimming levels, programmed schedule, and behavior after power is restored.
Review burn-in records against the agreed procedure. Record the operating duration, supply conditions, interruptions, and any units removed for repair. Watch for visible flickering, repeated restarting, unexpected shutdowns, or inconsistent behavior between otherwise identical units.
Where temperature verification is required, measure the designated component points under documented conditions. The measurement location, ambient conditions, and thermal stability matter; touching the housing is not an adequate thermal assessment.
Treat short-duration burn-in as a screening step, not proof of a multi-year service life. Long-term lumen-maintenance projections require appropriate test data and a separate evaluation method.
Inspect Sealing and Check Protection Evidence
Examine the gasket seating, cover closure, cable entries, and unused openings against the approved assembly requirements. Check for displaced seals, trapped wires, damaged sealing surfaces, and incorrectly fitted cable glands. After an inspection that involves opening the housing, verify that it has been properly reassembled.
Keep visual sealing checks separate from formal ingress-protection verification. IP classifications describe defined protection against the entry of solids and liquids; an informal spray demonstration should not be treated as equivalent to the required standardized testing.
Review the relevant protection reports and confirm their applicability to the supplied construction. Agree in advance which additional verification tests, if any, must be performed on shipment samples. Do not improvise potentially damaging tests during the final inspection.
Inspect the Packaged Product, Not Just the Loose Lamp
Open selected finished cartons and compare their contents with the packing specification. Verify the mounting hardware, connectors, control accessories, instructions, and any separately packed components. Check that loose accessories are secured and cannot strike the optical cover during transport.
Inspect the protective inserts, carton condition, product identification, and shipping marks. Reconcile the physical carton count with the packing list, and confirm that different configurations are clearly distinguished. Packaging protection and complete shipment documentation are important parts of pre-shipment verification, not separate administrative details.
Close Inspection Findings Before Authorizing Dispatch
Give each nonconformity a clear description, photograph, affected quantity, and required corrective action. Avoid vague comments such as “quality needs improvement.” A useful finding identifies exactly what differs from the agreed requirement.
For example, an incorrect driver setting should trigger a review of the affected production group, not merely an adjustment to the inspected unit. After correction, repeat the relevant checks and retain the new results alongside the original finding.
The final release record should identify the inspected batch, inspection scope, measurements, outstanding issues, and approval status. Shipment approval should follow completed verification—not the pressure of a loading deadline.
Conclusion
Inspecting LED street lights before shipment is a process of connecting requirements with evidence. Product configuration, assembly quality, electrical checks, photometric results, operating behavior, sealing, and packaging should all support the same release decision.
For your next LED street light order, discuss the inspection scope with TIANXIANG before production begins. Specify what must be checked, how acceptance will be determined, and which records must accompany the shipment.
Post time: Sep-22-2026
