Flujo Luminoso
Acerca de Luminous Flux Conversion
Luminous flux measures el/la total amount of visible light emitted by un/una source in todo directions—essentially el/la "total light output" of un/una lamp o LED. It's que tu ver on light bulb packaging un/una compare brightness. Unlike intensity (candela) cual measures light in one direction, o illuminance (lux) cual measures light received on un/una surface, luminous flux captures el/la completo light production regardless of donde eso goes. This makes lumens el/la fairest manera un/una compare light sources: un/una 1000-lumen LED y 1000-lumen incandescent produce el/la mismo total visible light, though su efficiency (lumens per watt) differs dramatically.
El/La SI unidad es el/la lumen (lm). Lumens replaced watts as el/la estandar brightness medir cuando energy-efficient lighting made watts misleading—un/una 10W LED puede match un/una 60W incandescent's 800 lumens. El/La lumen es defined in terms of candela: 1 lm = 1 cd·sr (candela-steradian). Luminous flux es weighted by human eye sensitivity, peaking at 555 nm (green-yellow)—esto es por que lumens medir perceived brightness, not raw optical power.
Our converter handles luminous flux unidades y helps entender el/la relationships entre diferente photometric quantities.
Luminous Flux Conversions y Relationships
| Desde | A | Multiplicar por |
|---|---|---|
| lumen (lm) | cd·sr | 1 (equivalent) |
| kilolumen (klm) | lm | 1,000 |
| lm | klm | 0.001 |
| megalumen (Mlm) | lm | 10⁶ |
| lm | millilumen (mlm) | 1,000 |
| cd (isotropic source) | lm | 4π ≈ 12.57 |
| lm | cd (isotropic) | 1/(4π) ≈ 0.0796 |
| lm | watt (at 555nm) | 1/683 ≈ 0.00146 |
Key relationships: 1 lumen = 1 candela·steradian. For un/una point source emitting uniformly in todo directions: total lumens = 4π × candela ≈ 12.57 × candela. At 555nm (peak eye sensitivity): 1 watt = 683 lumens exactamente.
Luminous Flux Unidad Reference
Lumen (lm) – El/La SI unidad of luminous flux, representing total perceived visible light power emitted by un/una source. By definition, 1 lm = 1/683 watt at 555nm (peak human eye sensitivity). This definition ties lumens un/una el/la photopic luminous efficacy function V(λ). Typical light source outputs: candle ~13 lm, 40W-equivalent LED ~450 lm, 100W-equivalent LED ~1600 lm, car headlight ~1000-3000 lm per bulb, stadium floodlight ~100,000 lm.
Candela steradian (cd·sr) – Mathematically equivalent un/una el/la lumen by definition. This notation explicitly muestra el/la relationship entre luminous intensity (candela) y el/la solid angle (steradian) eso illuminates. Un/Una 1-candela source emits 1 lumen into cada steradian of solid angle; since un/una completo sphere es 4π steradians, un/una isotropic 1-cd source emits 4π ≈ 12.57 lumens total.
Kilolumen (klm) – 1,000 lumens. Convenient for high-output sources: profesional projectors (3-10 klm), stage lighting (10-50 klm), stadium lights (50-200 klm). Increasingly usado as LED technology habilita higher outputs desde compact fixtures.
Megalumen (Mlm) – 1,000,000 lumens. Used for large-scale lighting installations: sports arena total lighting (50-200 Mlm), major concert stages (10-100 Mlm). Rarely applied un/una single sources.
Luminous efficacy (lm/W) – While not un/una flux unidad, esto ratio es esencial for comparing light sources: incandescent 10-17 lm/W, halogen 15-25 lm/W, CFL 50-70 lm/W, LED 80-200 lm/W, theoretical maximum 683 lm/W (at 555nm solo). Higher efficacy means mas light per watt of electricity.