luminous flux

It is the ratio of luminous flux to power.

The following equation calculates the total luminous flux in a source of light.

The relative luminous flux of a source was compared with a standard source.

Indirect fixtures direct most of their luminous flux upward toward a ceiling.

Similarly, the peak intensity will be of the total radiated luminous flux.

Illuminance is a measure of how much luminous flux is spread over a given area.

In other systems of units, luminous flux may have units of power.

The luminous flux is a weighted sum of the power at all wavelengths in the visible band.

Lumens define "luminous flux," which is energy within the range of frequencies we perceive as light.

In photometry, illuminance is the total luminous flux incident on a surface, per unit area.

It reaches 80% of its final luminous flux within 20 seconds, and the lamp can be restarted approximately five minutes after a power cut.

Luminous flux is usually measured in lumens.

The luminous flux (or visible energy) in a light source is defined by the photopic luminosity function.

The luminous flux is of less value for bicycle lighting due to the importance of directionality.

It is obtained by dividing the luminous flux by the radiant flux.

about the power consumption of a standard light bulb with the same luminous flux.

The SI unit of luminous flux is the lumen (lm).

Luminous flux is not used to compare brightness, as this is a subjective perception which varies according to the distance from the light source.

Similarly, luminous emittance is the luminous flux per unit area emitted from a surface.

If its area is 0.1 m ( 19" monitor) then the total light emitted, or luminous flux, would thus be 31.4 lm.

The amount of useful light emitted from a source or the luminous flux is measured in lumen (lm).

In some systems of units, luminous flux has the same units as radiant flux.

Retroreflective screens are seen as desirable due to the high image intensity they can produce with a given luminous flux from a projector.

A phot (ph) is a photometric unit of illuminance, or luminous flux through an area.

Illuminance, or luminous flux density, measured in lux is an important factor in indoor growing.