Definition
LED (Light Emitting Diode) lighting uses semiconductor technology to produce light through electroluminescence — when current passes through a semiconductor junction, electrons recombine with electron holes, releasing energy as photons. Unlike incandescent bulbs that waste 90% of energy as heat, LEDs convert 40-60% of electrical energy directly into visible light, achieving efficacies of 100-200+ lm/W. A typical LED luminaire consists of the LED chip package (SMD, COB, or CSP), a heat sink for thermal management, an LED driver that converts AC mains to DC constant current, and optics (lens/reflector) that shape the beam distribution.
Key Data
| Parameter | Value / Explanation |
|---|---|
| Efficacy (2026 typical) | 130-170 lm/W for commercial grade; 200+ lm/W for premium (DLC Premium) |
| Lifespan (L70) | 50,000-100,000 hours (11-22 years at 12h/day operation) |
| CRI range | 70-98 Ra — CRI 80+ standard commercial, CRI 90+ for retail/healthcare |
| CCT options | 2700K (warm) to 6500K (daylight), with tunable-white 2700-6500K available |
| Energy savings vs incandescent | 85-90% less energy for equivalent light output |
Application Guide
Commercial office
LED panel 600×600mm, 4000K, UGR ≤19, 130 lm/W
Meets EN 12464-1 with 50,000h L70 lifetime
Industrial warehouse
LED UFO high bay, 200W, 28,000 lm, IP65, 150 lm/W
Replaces 400W metal halide, 50% energy savings, instant-on
Retail display
LED track spot, COB, CRI 95+, 3000K, 15-25° beam
Superior color rendering makes merchandise look its best
Conclusion & Procurement Recommendation
When procuring LED lighting for B2B applications, verify three things beyond the spec sheet: (1) LM-80 test reports for lumen maintenance claims, (2) TM-21 projections showing L70 at actual operating temperature (not 25°C lab), and (3) driver warranty terms — the driver is the most common failure point, not the LEDs themselves. For projects over 500 fixtures, require a 5-year on-site warranty with defined lumen depreciation thresholds.