Definition
Lighting is the deliberate use of light to achieve practical or aesthetic effects. It encompasses artificial light sources (LED, fluorescent, HID), natural daylight integration, and the control systems that manage them. In the built environment, lighting serves three primary functions: general (ambient) illumination for visibility and safety, task lighting for specific activities requiring higher light levels, and accent lighting to highlight architectural features or merchandise. Modern lighting design balances energy efficiency (efficacy measured in lm/W), visual comfort (UGR, uniformity), and color quality (CRI, CCT) to create spaces that are both functional and appealing.
Key Data
| Parameter | Value / Explanation |
|---|---|
| General lighting | Uniform ambient illumination — typically 200-500 lux depending on space type |
| Task lighting | Focused illumination for specific activities — 500-1000 lux (reading, assembly, inspection) |
| Accent lighting | Directional light to highlight features — 3-5× ambient level, narrow beam (15-40°) |
| Typical office efficacy | 100-130 lm/W for standard LED panels, meeting EN 12464-1 requirements |
| Global market size (2026) | $120B+ for general lighting, growing 8-10% CAGR driven by LED adoption |
Application Guide
Office
4000K, 500 lux, UGR ≤19, CRI ≥80
EN 12464-1 standard for writing/typing/reading tasks
Retail
3000-4000K, 300-1000 lux (layered), CRI ≥90
Color accuracy critical for merchandise presentation
Industrial/Warehouse
4000-5000K, 150-300 lux, IP65+, 130+ lm/W
Durability and energy efficiency prioritized over color quality
Conclusion & Procurement Recommendation
For B2B procurement, always specify lighting by function (not by fixture type alone). A warehouse needs general + task lighting; a retail store needs ambient + accent layers. RFQs should include: maintained illuminance (lux), UGR limit, CRI minimum, efficacy (lm/W), and IP rating — not just wattage and quantity. Request IES files for photometric verification and LM-80 reports for lifetime claims.