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Approving a lighting sample means turning a physical object into a written standard. Instead of replying that the sample is acceptable, record the model reference, the measured dimensions, the finish, the light source and colour temperature, the control method and the packaging, then confirm that record in writing. Anything not written down is left to interpretation, and interpretation is what a batch dispute is made of.
What to check on a sample
- Dimensions against the drawing — overall size and drop, measured rather than assumed.
- Finish and colour — consistency across the whole fixture, including internal surfaces and the joints between parts.
- Light appearance — whether the output is even, whether any glare is visible, and whether the diffuser hides the light source.
- Colour temperature — checked against the specification, and checked across fixtures if more than one is in the sample.
- Driver and control behaviour — how the fixture responds to the control method it will be used with.
- Glass, crystal and decorative elements — quality, edge finish, and consistency between the sample and the quotation.
- Wiring, terminals and fixings — construction quality and whether the mounting hardware suits the ceiling it will be fitted to.
- Marks and labels — model reference, manufacturer details and the certification mark placement for your market.
- Packaging — whether the fixture, and especially the glass and crystal, is protected for the journey it will make.
How to seal a sample as the production standard
- Photograph the sample in daylight from the angles a customer will see it, and keep those photographs with the written record.
- Measure and record the dimensions instead of describing them.
- Keep a reference sample with the factory and one with you, so both sides are comparing the same physical object.
- Write the approved specification into the purchase order, including the sample date and reference.
- Confirm anything that was agreed verbally in writing before the order is placed.
What the written standard has to contain
- The model reference or design reference, exactly as it appears on the order.
- Dimensions and drop, with tolerances where the tolerances matter.
- Material, finish and colour reference.
- Light source, colour temperature and control method.
- Branding, labelling and packaging requirements.
- The inspection points that will be photographed during production.
Pre-production checks
The checks below happen between order confirmation and the start of manufacturing, which is the last point where a change costs nothing:
- The approved sample is confirmed as the reference standard for the batch.
- The material and finish supplier matches the one used for the sample.
- The driver and light source model match the approved configuration.
- Label, artwork and market-specific marking are confirmed before printing.
- The packing method is confirmed, including how the fixture is fixed inside the carton.
Inspection during and after production
- Agree stage inspection points in advance and require photographs at each one.
- Pre-shipment inspection against the approved standard, not against a general impression of quality.
- For larger or higher-value orders, book a third-party inspection rather than relying on the supplier's own report.
- If a defect appears, document it with photographs, the model reference and the batch or carton marking, so the issue can be traced to a production run.
What we do not publish
Our published product pages do not state lumen output, CRI or ingress protection figures, so we do not quote them. If your project requires measured photometric data, ask us with the model reference and we will confirm what can be supplied and measured for that model rather than estimating a figure.
How sampling works with Huixiang Lighting
A sample is produced and approved before mass production, and the approved sample becomes the reference standard for the batch. If the configuration changes after approval — a different size, material or finish — it becomes a new production batch and is sampled again. Our factory scale, warranty terms and order conditions are set out on the company profile, and buyer questions are collected on our FAQ page.
Where to go next
For how a custom configuration is quoted and produced, see OEM vs ODM lighting manufacturing. For the documentation that has to accompany the shipment, see lighting certifications for importers.
Lighting Sample Approval and Pre-Production Checks — Frequently Asked Questions
Should I pay for a lighting sample?
Expect to pay for the sample and normally for the courier as well. A free sample rarely compensates for the loss of clarity about who is carrying the production cost, and a paid sample is easier to treat as a specification decision rather than a favour.
How long should I spend checking a sample?
Long enough to measure it and photograph it against the written specification you will put in the order. The check that prevents most disputes is comparing measured dimensions and finish against the order wording, rather than making a general judgement about quality.
What should I do if the sample is close but not exactly right?
Say so in writing, with the specific difference, and have a second sample produced. Approving a sample that is 'nearly right' transfers that difference into the production batch, where it becomes the standard.
What is a sealed or counter sample?
A sample kept by both the buyer and the factory as the physical reference for the order. When a batch is inspected, it is compared against that sample rather than against a catalogue image or a verbal description.
Do I need third-party inspection for a lighting order?
For larger or higher-value orders it is usually worth it, because it puts the inspection report in the hands of a party with no commercial interest in the outcome. For smaller orders, agreeing stage photographs in advance covers much of the same ground.
What if the batch does not match the approved sample?
Document the difference with photographs, the model reference and the batch or carton marking, notify the supplier in writing immediately, and ask for a batch-level remedy rather than accepting unit-by-unit replacements.