Illumination Converter
Illumination, also known as illuminance, is the total luminous flux incident on a surface, per unit area. It is a measure of how much the incident light illuminates the surface. The SI unit of illuminance is lux (lx).
Illumination Converter
Convert between different units of illumination (illuminance)
About Illumination Units
Illumination is measured in various units, including:
- Lux (lx): The SI unit of illuminance, equal to one lumen per square meter
- Foot-candle (fc): A non-SI unit of illuminance, equal to one lumen per square foot
- Phot (ph): A CGS unit of illuminance, equal to one lumen per square centimeter
- Lumen/square meter (lm/m²): Equivalent to lux
- Lumen/square foot (lm/ft²): Equivalent to foot-candle
Common Reference Values
To understand illumination levels, here are some common reference values:
- Full moonlight: approximately 0.1 lux
- Home living room: 50-200 lux
- Office lighting: 300-500 lux
- Overcast day: 1,000 lux
- Full daylight (not direct sun): 10,000-25,000 lux
- Direct sunlight: 32,000-100,000 lux
Common Applications
Illumination measurements are important in:
- Architectural and interior lighting design
- Workplace safety and ergonomics
- Photography and cinematography
- Horticulture and plant growth
- Museum and art conservation
- Public space and street lighting