the luminous flux incidence (commonly "amount" of light)

At a point on a surface. Quotient of the luminous flux incident on an element of the surface containing the point, and the area of that element. Unit lux, lx.

Illuminance is the density of light falling on a surface. It is expressed in footcandles or lux. The reference plane can be horizontal, e.g. a counter or desk, or it can be vertical, e.g., a sign on the wall.

Is the term quantifying the illumination of, or incident light falling on a surface.

Density of luminous flux incident on a surface. Unit is footcandle or lux.

Measured of light in lumens per square metre.

A photometric term that quantifies light incident on a surface, usually the working plane. Illuminance is commonly called light level. It is expressed as lumens per square meter (lux).

The density of luminous flux (rate of emission of luminous energy flow of a light source in all directions) incident on a surface; the quotient of the flux divided by the area of the surface, when the surface is uniformly illuminated.

The light density (the luminous flux divided by area) shining onto a surface. This is the specification that measures how bright a screen is lit by a projector or ambient light. The unit is lux. 1 lux = 1 lumen/m2.

The intensity of light falling on a surface. This could also be described as the brightness of the light. Illuminance is measured in lux. See also Lux.

The level of illumination on a surface.

The "density" of light (lumens/area) incident on a surface; i.e. the light level on a surface. Illuminance is measured in footcandles or lux.

The result of luminous flux striking a surface. In english units, 1 lumen of flux falling on one square foot area is defined as one foot-candle illumination. In metric units, 1 lumen illuminating one square meter is the definition for 1 lux. This gives a direct conversion factor 10.76 lux = 1 foot-candle.

The amount of light that reaches a surface. Illuminance is measured in footcandles (lumens/square foot) or lux (lumens/square meter). One footcandle equals 10.76 lux, although for convenience the IESNA uses 10 lux as the equivalent.

In plain English, illuminance is the quantity of light arriving at a point on a real or imaginary surface. (The point does not have to be located on a physical surface.)

A measure of the amount of light falling on a particular point, measured in Lux

Illuminance is a measure of luminous flux per unit area. Illuminance is typically expressed in lux (lumens per square meter) or foot-candles (lumens per square foot).

Density of the luminous flux incident upon a surface. It is the quotient of the luminous flux by the area of the surface when the latter is uniformly illuminated.

Amount of light that falls on a surface (measured in lumens per square foot)

A measure of the amount of light incident on a surface; measured in foot-candles or Lux.

The measurement of light in lumens per square metre, the unit of which is the lux.

Light arriving at a surface, expressed in lumens per unit area; 1 lumen per square foot equals 1 footcandle, while 1 lumen per square meter equals 1 Lux.

Illuminance refers to luminous flux per unit area that arrives at a particular surface from one or more light sources. Illuminance is measured horizontally and vertically in units of lux (lx) or footcandles (fc). When the incident light is not parallel, which is normal, a cosine diffuser must be used as the measurement geometry for `visible light meter' detector heads. Formula: E = lx = lm / m2 E = fc = lm / ft2

The density of incident luminous flux on a surface; illuminance is the standard metric for lighting levels, and is measured in lux (lx) or footcandles (fc).

The total luminous flux received on a unit area of a given real or imaginary surface, expressed in such units as the foot-candle, lux, or phot.

is the amount of luminous flux falling on a surface area and is measured in lux or foot candle.

The density of luminous flux incident on a uniformly illuminated area, measured in footcandles (lumens per square foot) or lux (lumens per square meter).

The density of luminous flux on a surface, is measured in footcandles (one lumen per square foot) or lux (one lumen per square meter).

The amount of light striking a surface or object, measured in footcandles or lumens.

The "density" of light (lumens/area) incident on a surface. Illuminance is measured in foot-candles or lux.

The density of light indicated on an area, measured in foot-candles or lux.

A photometric term that quantifies light incident on a surface or plane. Illuminance is commonly called light level. It is expressed as lumens per square foot (foot-candles), or lumens per square meter (lux).

The amount of light falling on a surface. Measured in units of lux (lumens per square meter) or foot candles (fc, lumens per square foot).

The illuminous flux density at a surface i.e. the luminous flux incident per unit area. (This quantity was formally known as the illumination value or illumination level).

The photometric equivalent of irradiance. Illuminance is obtained by integrating spectral irradiance weighted by luminous efficiency over the visible spectrum. Compare luminance.

The luminous flux density at the surface being lit, usually measured with a light meter. The unit is the lux, one lumen per square meter.

In photometry, illuminance is the total luminous flux incident on a surface, per unit area. It is a measure of the intensity of the incident light, 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.