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Illuminance Converter
What this does
Converts light level at a surface between lux, foot-candles, lumens per square metre and phot.
Handy anchors
- 1 foot-candle = 10.76 lux. Office lighting: 300–500 lux. Overcast day: 1,000 lux. Direct sun: 100,000 lux.
Good to know
Lux measures light arriving on a surface; lumens measure what a lamp emits. A bulb's lumens spread over a larger area gives fewer lux.
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