| Product safety compliance | Finished luminaires should be tested against the applicable safety requirements for their destination market. | IEC 60598 series; applicable national electrical-safety requirements. | Reduces electrical, thermal, fire, and installation risks. | Request current test reports, declarations of conformity, and product-specific technical files. |
| Ingress protection | Indoor dry-area products generally require an appropriate low-IP rating; bathrooms, exteriors, and wet locations require a rating selected for the exposure. | IEC 60529. IP ratings identify protection against solids and water; the correct rating depends on the installation zone. | Prevents premature failure and helps meet local installation rules. | Match the declared IP rating to the intended application and review test documentation. |
| Electrical efficiency | Require project-specific lumen output, input power, and efficacy figures rather than relying only on nominal wattage. | Photometric test reports based on recognized measurement methods, such as LM-79 where applicable. | Enables accurate energy-cost and lighting-level calculations. | Compare delivered lumens, system watts, power factor, and test conditions on the same basis. |
| Color quality | Color temperature, color rendering, and color consistency should be stated clearly for each model and batch. | CIE colorimetry practices; CRI is commonly reported as Ra, while consistency may be expressed using chromaticity tolerances. | Supports consistent appearance across rooms, projects, and replacement orders. | Request measured CCT, CRI/Ra, chromaticity tolerance, and sample approval before mass production. |
| LED lifetime evidence | Lifetime claims should identify lumen-maintenance assumptions, operating temperature, current, and failure criteria. | IES LM-80 for LED package or module lumen maintenance; IES TM-21 for projection of lumen maintenance. | Separates documented performance from unsupported hour claims. | Ask for LM-80 data, TM-21 calculations where relevant, thermal data, and the stated L-value. |
| Glare and visual comfort | The supplier should provide optical data and offer suitable beam angles, diffusers, shielding, or dimming options. | Photometric files such as IES or LDT; glare assessment should follow the requirements of the target project. | Improves comfort in living rooms, bedrooms, kitchens, and work areas. | Review photometric files, visual mock-ups, shielding details, and room-specific calculations. |
| Dimming and controls | Control compatibility, minimum dimming level, flicker behavior, and driver replacement options should be documented. | For digital lighting control, DALI is defined by IEC 62386; other control systems require their own compatibility checks. | Avoids incompatibility, audible noise, unstable dimming, and costly rework. | Test the exact lamp, driver, dimmer, and control protocol combination before approval. |
| Flicker and temporal light modulation | Products should provide measured flicker information, especially for spaces used for reading, studying, or extended occupancy. | Request measurements using a recognized temporal-light-modulation method; acceptance limits may depend on the project specification. | Supports visual comfort and responsible specification decisions. | Ask for flicker percentage, frequency, and relevant index or measurement data at full and dimmed output. |
| Material and chemical compliance | Materials and components should comply with the chemical restrictions applicable to the destination market. | EU RoHS Directive 2011/65/EU, as amended; REACH Regulation (EC) No 1907/2006 where applicable. | Reduces customs, regulatory, and environmental-compliance risks. | Request a current declaration, material disclosures, and supplier-control records. |
| Quality management | A documented quality system should cover incoming materials, production checks, final inspection, and corrective actions. | ISO 9001 certification can support process verification, but it does not replace product testing. | Improves consistency across repeat orders and private-label production. | Review the certificate scope, inspection plan, defect criteria, and sample quality records. |
| Warranty and after-sales support | Written warranty terms should define coverage, exclusions, claim evidence, replacement responsibility, and response times. | Warranty duration is contractual; a longer period is not meaningful without clear conditions and service procedures. | Limits lifecycle risk and simplifies project maintenance. | Obtain a signed warranty document and confirm local spare-part and replacement arrangements. |
| Supply-chain and delivery capability | The supplier should provide realistic lead times, minimum order quantities, packaging specifications, and continuity plans. | Evidence is commercial and operational rather than a single universal lighting standard. | Reduces project delays and protects availability for future replacement orders. | Check production capacity, component change-control procedures, shipping records, and approved pre-production samples. |
| Documentation and traceability | Each product version should have identifiable specifications, revision control, batch information, and installation instructions. | Product traceability is supported by documented quality procedures and controlled technical records. | Makes audits, troubleshooting, recalls, and repeat purchasing more manageable. | Require datasheets, wiring diagrams, photometric files, labels, manuals, and batch-level records. |