Definition
LED and incandescent represent two eras of lighting technology. Incandescent bulbs produce light by passing electricity through a thin tungsten filament until it glows white-hot (~2,700°C). This process converts only 5-10% of electricity to visible light — the remaining 90-95% is emitted as infrared heat. LEDs produce light through solid-state electroluminescence, converting 40-60% of electricity directly to light. Incandescent bulbs are being phased out globally (EU 2012, US 2023, China 2012-2016) due to energy inefficiency. The comparison is relevant for B2B buyers replacing legacy installations and for decorative/chandelier applications where LED filament bulbs now replicate the incandescent aesthetic.
Key Data
| Parameter | Value / Explanation |
|---|---|
| Efficacy | LED: 100-200 lm/W | Incandescent: 10-18 lm/W — LED is 10× more efficient |
| Lifespan | LED: 50,000h | Incandescent: 750-2,000h — LED lasts 25-50× longer |
| CRI | LED: 80-98 | Incandescent: 100 (perfect, blackbody radiator) |
| Annual energy cost (60W eq, 3h/day) | LED (8W): $1.05/yr | Incandescent (60W): $7.88/yr — 87% savings |
Application Guide
General lighting
LED — no exception
Incandescent is obsolete for general illumination and banned in most markets
Decorative chandelier
LED filament bulb, 2700K, CRI 90+, clear glass, dimmable
LED filament technology perfectly replicates incandescent aesthetic with 90% energy savings
Conclusion & Procurement Recommendation
Incandescent is obsolete. For any B2B application, LED replacements exist — LED filament bulbs for decorative, LED A19/BR30 for general, LED reflector for directional. The only legitimate exception: specialized heating applications where the light bulb is primarily a heat source (reptile terrariums, food warming, some industrial processes) and LED is not an appropriate replacement.