| Product Application | Confirm whether the luminaire is designed for exterior walls, entrances, pathways, façades, or coastal environments. | Technical datasheet, installation drawing, photometric file, and application photographs. | Outdoor wall lights must match the mounting position, exposure level, beam direction, and intended lighting effect. | Must Verify |
| Ingress Protection | IP44 provides protection against water splashes; IP65 provides dust-tight protection and resistance to water jets. | Product marking, test report, and model-specific laboratory documentation. | Higher water and dust protection is generally more suitable for exposed outdoor installations, but the rating must match the actual design. | High Priority |
| Electrical Safety | For international orders, confirm compatibility with the destination market’s voltage, frequency, grounding, and safety requirements. | Wiring diagram, input specification, insulation details, and applicable conformity documents. | Electrical compatibility reduces installation problems, safety risks, and customs or project-delivery delays. | Must Verify |
| Operating Voltage | Common lighting inputs include 220–240 V AC, 110–120 V AC, and selected low-voltage DC systems. | Model-specific label, driver specification, and sample test under the buyer’s local power conditions. | The correct input range helps prevent flicker, overheating, premature failure, or incompatibility with the building electrical system. | High Priority |
| LED Efficiency | Compare complete-luminaire efficacy in lumens per watt (lm/W), rather than evaluating the LED chip alone. | Independent test report or photometric report showing input power and delivered lumens. | Whole-fixture efficacy provides a more realistic basis for energy consumption and operating-cost comparisons. | Compare Samples |
| Color Performance | Typical exterior applications use 2700–3000 K for warm ambience, 4000 K for neutral appearance, and 5000–6500 K for cooler white light. | Color-temperature specification, color-rendering data, and photographs taken under controlled conditions. | Color temperature affects architectural appearance, visual comfort, and consistency across a project. | Project Specific |
| Color Rendering | For general outdoor areas, CRI 80+ is a common baseline; higher CRI may be preferred where material and color appearance are important. | LM-80, TM-21, or luminaire-level photometric documentation where applicable. | Higher color rendering can improve the appearance of façades, landscaping, signage, and entrance areas. | Project Specific |
| Surge Protection | Ask for the surge-protection rating in kilovolts and clarify whether protection is integrated into the fixture or supplied separately. | Driver datasheet, circuit diagram, and test documentation for the complete luminaire. | Outdoor fixtures can be exposed to switching events and electrical surges, especially on long exterior cable runs. | High Priority |
| Thermal Management | Review heat-sink construction, driver placement, ventilation strategy, and rated ambient operating temperature. | Material specification, thermal test results, and sample operation at the stated ambient temperature. | Effective heat dissipation supports LED output stability and longer component life. | Must Verify |
| Material and Finish | Common outdoor housing materials include aluminum alloys, stainless steel, glass, and UV-resistant polymers. | Material declaration, coating specification, salt-spray data where relevant, and finish samples. | Housing and coating quality influence corrosion resistance, appearance retention, and service life. | Coastal Check |
| Photometric Control | Evaluate beam angle, upward light, glare control, cut-off design, and light distribution for the mounting height. | IES or LDT file, polar curve, lux simulation, and completed sample installation. | Accurate distribution helps achieve uniform illumination while reducing glare and unwanted light spill. | Compare Samples |
| Testing and Quality Control | Use documented incoming-material checks, assembly inspection, electrical safety testing, aging tests, and final inspection. | Quality-control procedure, inspection checklist, sample test records, and corrective-action process. | A repeatable quality system is more reliable than a single successful sample. | High Priority |
| Customization Capability | Assess options for dimensions, finish, color temperature, beam angle, cable length, mounting accessories, and dimming. | Engineering drawings, prototype process, tooling terms, minimum order quantity, and change-control procedure. | Clear customization procedures reduce specification errors in architectural and commercial projects. | Project Specific |
| Minimum Order Quantity | Request separate quantities for standard products, customized products, samples, and replacement parts. | Written quotation with quantity tiers, tooling fees, sample charges, and validity period. | Transparent quantity rules help buyers calculate landed cost and avoid unexpected production charges. | Cost Check |
| Lead Time and Capacity | Confirm sample lead time, mass-production lead time, monthly capacity, and peak-season production constraints. | Production schedule, capacity statement, order milestones, and shipment history with sensitive details removed. | Realistic planning is essential for construction schedules, container booking, and project handover. | Schedule Check |
| Packaging and Logistics | Packaging should protect glass, finishes, drivers, mounting hardware, and fragile protruding parts during international transport. | Packaging photographs, carton dimensions, gross weight, drop-test procedure, and export packing list. | Proper packaging reduces transit damage, claims, rework, and replacement costs. | Must Verify |
| Warranty and Spare Parts | Review warranty duration, covered components, exclusions, claim evidence, response time, and spare-part availability. | Signed warranty terms, driver and LED replacement policy, and after-sales contact procedure. | Clear after-sales terms protect the buyer’s maintenance budget and long-term project performance. | High Priority |
| Sample Validation | Test at least one production-representative sample for appearance, dimensions, light output, heat, wiring, and water-resistance requirements. | Approved sample, signed specification sheet, photographs, and pre-shipment inspection report. | Sample approval creates a measurable reference for mass-production quality and dispute resolution. | Essential Step |
| Total Cost of Ownership | Compare unit price together with energy use, freight, installation accessories, maintenance, replacement parts, and expected service requirements. | Itemized quotation, energy estimate, maintenance assumptions, and landed-cost calculation. | The lowest purchase price may not provide the lowest long-term project cost. | Final Review |
