lux · fc · klx · mlx · lm/m²
Free Illumination Converter
Convert illumination units instantly — lux, foot-candle, phot, kilolux, millilux, lumen/m², W/m². Free, symmetrical, no sign-up.
Why symmetrical conversion?
How This Converter Works
Illumination (illuminance) measures the amount of light falling on a surface. Lux is the SI standard, foot-candles are used in the US film and photography industry. Our converter handles 10 illumination units.
Quick reference
Common Conversions
| Lux (lx) | Foot-candle (fc) | Context |
|---|---|---|
| 0.001 lx | 0.0001 fc | Moonless night sky |
| 1 lx | 0.093 fc | Full moonlit night |
| 400 lx | 37.2 fc | Office lighting standard |
| 1,000 lx | 92.9 fc | TV studio lighting |
| 10,000 lx | 929 fc | Overcast outdoor daylight |
| 100,000 lx | 9,290 fc | Direct sunlight |
FAQ
Frequently Asked Questions
1What is the difference between lux and lumens?
Lumens measure the total light output from a source. Lux measures the light intensity falling on a surface area: 1 lux = 1 lumen per square meter. A 1,000 lumen bulb in a 10 m² room creates about 100 lux.
2How many lux is recommended for office lighting?
Standard office lighting requires 300–500 lux on the work surface. Fine detail work like drafting recommends 750–1,000 lux. EU standard EN 12464-1 specifies 500 lux for office desks.
3What is a foot-candle?
One foot-candle equals 10.764 lux — the illuminance of one lumen per square foot. It is used in US photography, theatre, and architectural lighting specifications.
4How bright is sunlight in lux?
Direct sunlight is approximately 100,000 lux. Overcast daylight is 1,000–25,000 lux. Indoor lighting is typically 100–1,000 lux depending on the space.
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