Practical answer
Choose the optical task before selecting wattage or fixture length
Relate surface texture, setback, viewing distance, spill limits and maintenance access to one optical task. Grazing reveals texture, washing seeks broader uniformity, outline lighting defines edges, and dynamic effects require a separate control and commissioning responsibility matrix.
Decision matrix
| Site condition | Specification response | Approval evidence |
|---|---|---|
| Textured close setback | Test grazing angle and shadow depth | Full-scale wall mock-up and aiming record |
| Broad facade plane | Use distribution and spacing for controlled uniformity | Calculation grid and photometric file |
| Dynamic outline or pixels | Define protocol, addressing, scenes and fail state | Control topology and commissioning matrix |
Selection and verification workflow
- Survey material, texture and viewing points.
- Fix setback and optical task.
- Model spill, glare and reflected brightness.
- Coordinate wiring, access and control ownership.
- Approve physical mock-up and final scene record.
Limits and responsibility boundaries
- Wattage alone cannot predict facade appearance.
- Dynamic control adds commissioning and maintenance scope.
- Attachment and waterproofing details need facade-team approval.
Evidence to request before approval
Treat a model name or brochure statement as a starting point. The offered construction and the supporting file must refer to the same configuration.
- Optic-specific photometric file.
- Dimension and bracket drawing.
- Finish sample and thermal data.
- Wiring and control topology.
- Mock-up acceptance and aiming schedule.
RFQ input checklist
A comparable quotation needs the same site inputs, document scope and commercial assumptions from every bidder.
- Country, city, site plan, application zones and current project stage.
- Fixture quantities, mounting details, voltage, CCT, beam and control requirements.
- Heat, dust, salt, water, irrigation, public-access and maintenance exposure.
- Datasheet, photometric file, drawing, material, finish and test-evidence requirements.
- Sample, mock-up, packing, spare-parts, delivery and warranty expectations.