Illuminance Conversion Online
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, wavelength-weighted by the luminosity function to correlate with human brightness perception. Similarly, luminous emittance is the luminous flux per unit area emitted from a surface. Luminous emittance is also known as luminous exitance.
In SI units illuminance is measured in lux (lx), or equivalently in lumens per square metre (lm·m−2). Luminous exitance is measured in lm·m−2 only, not lux. In the CGS system, the unit of illuminance is the phot, which is equal to 10000 lux. The foot-candle is a non-metric unit of illuminance that is used in photography.
Illuminance was formerly often called brightness, but this leads to confusion with other uses of the word, such as to mean luminance. "Brightness" should never be used for quantitative description, but only for nonquantitative references to physiological sensations and perceptions of light.
Top Illuminance Convert Search
- 9 Footcandle to Lumen per Square Foot
- 10000000000 Lux to Lumen per Square Foot
- 10000000000 Lux to Lumen per Square Centimeter
- 1000000000 Megalux to Lux
- 10000000000 Lux to Kilolux
- 16 Megalux to Lux
- 10000000000 Megalux to Lumen per Square Millimeter
- 10000000000 Lux to Lumen per Square Yard
- 10000000000 Megalux to Nox
- 10000000000 Megalux to Phot
- 10000000000 Megalux to Footcandle
- 10000000000 Megalux to Nanolux
- 10000000000 Megalux to Gigalux
- 10000000000 Lux to Lumen per Square Millimeter
- 10000000000 Megalux to Lux
- 10000000000 Lux to Lumen per Square Meter
Others Convert
- Acceleration
- Angle
- Area
- Area Density
- Chemical Amount
- Data Storage
- Data Transfer Rate
- Density
- Electric Charge
- Electric Current
- Electric Potential
- Energy
- Flow
- Force
- Frequency
- Fuel Consumption
- Illuminance
- Length
- Luminance
- Luminous Intensity
- Mass Flow
- Power
- Pressure
- Speed
- Temperature
- Time
- Torque
- Volume
- Weight and Mass