Illuminance Converter
Convert between different illuminance units including lux, foot-candle, phot, and more for lighting design and measurement applications.
Illuminance Converter
92.902267
About Illuminance Conversion
Illuminance measures the amount of light falling on a surface per unit area. It's crucial for lighting design, photography, and ensuring proper lighting conditions for various activities.
Understanding Illuminance
- Definition: Luminous flux per unit area (lumens per square meter)
- SI Unit: Lux (lx) = 1 lumen per square meter
- Measurement: Using light meters or lux meters
- Varies by: Distance from light source, angle, and reflectance
Typical Illuminance Levels
- Sunlight (direct): ~100,000 lux
- Daylight (overcast): ~1,000-10,000 lux
- Office lighting: ~300-500 lux
- Living room: ~100-300 lux
- Street lighting: ~10-20 lux
- Full moon: ~0.25 lux
- Starlight: ~0.001 lux
Lighting Applications
- Reading/Study: 500-1000 lux recommended
- Computer work: 300-500 lux
- General office: 200-500 lux
- Precision work: 1000-2000 lux
- Surgery: 10,000-100,000 lux
Conversion Facts
- 1 Lux = 0.0929 foot-candles
- 1 Foot-candle = 10.764 lux
- 1 Phot = 10,000 lux
- Illuminance decreases with square of distance