如何计算Luminosity Converter
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Luminosity (light intensity) converters translate between candela, lumens, lux, and foot-candles for lighting calculations.
公式
1 lumen = 1 cd × solid angle (steradians)
分步指南
- 11 candela (cd) = standard light intensity unit
- 21 lumen = 1 cd × solid angle (steradians)
- 31 lux = 1 lumen/m²; 1 foot-candle = 10.764 lux
例题解析
输入
Desk lamp 500 lumens, distributed to 2 m² area
结果
Illumination ≈ 250 lux (good task lighting)
Typical office ~300-500 lux
常见错误注意事项
- ✕Confusing lux with lumens (very different meanings)
- ✕Neglecting distance and inverse square law
常见问题
Why separate lux from lumens?
Lumens = total light output (independent of area); lux = intensity at surface (lumens/area).
How does distance affect illumination?
Inverse square law: doubling distance reduces illumination 4×. Affects lamp placement.
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