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Luminous Flux Formula

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Luminous flux is a measure of the total amount of light emitted by a light source in all directions. It quantifies the overall brightness or output of the source. Check FAQs

F = \frac{A \cdot I v}{L^{2}}

F - Luminous Flux?A - Area of Illumination?I_v - Luminous Intensity?L - Length of Illumination?

Luminous Flux Example

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Here is how the Luminous Flux equation looks like with Values.

Here is how the Luminous Flux equation looks like with Units.

Here is how the Luminous Flux equation looks like.

42.9524 = \frac{41 \cdot 4.62}{{2.1}^{2}}

42.9524lm = \frac{41m² \cdot 4.62cd}{{2.1m}^{2}}

42.9524 = \frac{41 \cdot 4.62}{{2.1}^{2}}

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Luminous Flux Solution

Follow our step by step solution on how to calculate Luminous Flux?

FIRST Step Consider the formula

F = \frac{A \cdot I v}{L^{2}}

Next Step Substitute values of Variables

∴

F = \frac{41m² \cdot 4.62cd}{{2.1m}^{2}}

Next Step Prepare to Evaluate

∴

F = \frac{41 \cdot 4.62}{{2.1}^{2}}

Next Step Evaluate

∴

F = 42.952380952381lm

LAST Step Rounding Answer

∴

F = 42.9524lm

Luminous Flux Formula Elements

Variables

Luminous Flux

Luminous flux is a measure of the total amount of light emitted by a light source in all directions. It quantifies the overall brightness or output of the source.

Symbol: F

Measurement: Luminous FluxUnit: lm

Note: Value can be positive or negative.

Formulas to find Luminous Flux

Area of Illumination

Area of illumination refers to the size or extent of the space covered by light from a source, determining the reach and coverage of light in that area.

Symbol: A

Measurement: AreaUnit: m²

Note: Value should be greater than 0.

Formulas to find Area of Illumination

Luminous Intensity

Luminous intensity is a measure of the amount of light emitted by a light source in a specific direction. It quantifies the brightness or concentration of light in that direction.

Symbol: I_v

Measurement: Luminous IntensityUnit: cd

Note: Value can be positive or negative.

Formulas to find Luminous Intensity

Length of Illumination

Length of illumination refers to the duration or period of time that a lighting system or light source remains turned on and provides illumination before being switched off or replaced.

Symbol: L

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Length of Illumination

Other formulas in Illumination Parameters category

Go Solid Angle

ω = \frac{A}{r^{2}}

Go Reduction Factor

RF = \frac{M.S.C.P.}{M.H.C.P.}

Go Number of Lamps Required for Illumination

N Lamp = \frac{E v \cdot A}{F \cdot UF \cdot MF}

Go Mean Spherical Candle Power

M.S.C.P. = \frac{F}{4 \cdot π}

How to Evaluate Luminous Flux?

Luminous Flux evaluator uses Luminous Flux = (Area of Illumination*Luminous Intensity)/(Length of Illumination^2) to evaluate the Luminous Flux, The Luminous Flux is defined as the total quantity of the light energy emitted per second from a body. Luminous Flux is denoted by F symbol.

How to evaluate Luminous Flux using this online evaluator? To use this online evaluator for Luminous Flux, enter Area of Illumination (A), Luminous Intensity (I_v) & Length of Illumination (L) and hit the calculate button.

FAQs on Luminous Flux

What is the formula to find Luminous Flux?

The formula of Luminous Flux is expressed as Luminous Flux = (Area of Illumination*Luminous Intensity)/(Length of Illumination^2). Here is an example- 353.288 = (41*4.62)/(2.1^2).

How to calculate Luminous Flux?

With Area of Illumination (A), Luminous Intensity (I_v) & Length of Illumination (L) we can find Luminous Flux using the formula - Luminous Flux = (Area of Illumination*Luminous Intensity)/(Length of Illumination^2).

Can the Luminous Flux be negative?

Yes, the Luminous Flux, measured in Luminous Flux can be negative.

Which unit is used to measure Luminous Flux?

Luminous Flux is usually measured using the Lumen[lm] for Luminous Flux. Candela Steradian[lm], Lux Square Meter[lm] are the few other units in which Luminous Flux can be measured.

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