Illumination Calculator

✖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.ⓘ Luminous Flux [F]			+10% -10%
✖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.ⓘ Area of Illumination [A]			+10% -10%

✖Illumination intensity refers to the level or strength of light in a given area. It quantifies the amount of light reaching a surface and is typically measured in units such as lux or foot-candles.ⓘ Illumination [E_v]

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Formula

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Illumination

Formula

`"E"_{"v"} = "F"/"A"`

Example

`"1.02439lx"="42lm"/"41m²"`

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Illumination Solution

STEP 0: Pre-Calculation Summary

Formula Used

Illumination Intensity = Luminous Flux/Area of Illumination
E_v = F/A
This formula uses 3 Variables

Variables Used

Illumination Intensity - (Measured in Lux) - Illumination intensity refers to the level or strength of light in a given area. It quantifies the amount of light reaching a surface and is typically measured in units such as lux or foot-candles.
Luminous Flux - (Measured in Lumen) - 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.
Area of Illumination - (Measured in Square Meter) - 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.

STEP 1: Convert Input(s) to Base Unit

Luminous Flux: 42 Lumen --> 42 Lumen No Conversion Required
Area of Illumination: 41 Square Meter --> 41 Square Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

E_v = F/A --> 42/41

Evaluating ... ...

E_v = 1.02439024390244

STEP 3: Convert Result to Output's Unit

1.02439024390244 Lux --> No Conversion Required

FINAL ANSWER

1.02439024390244 ≈ 1.02439 Lux <-- Illumination Intensity

(Calculation completed in 00.004 seconds)

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Created by Prahalad Singh

Jaipur Engineering College and Research Centre (JECRC), Jaipur

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Birsa Institute of Technology (BIT), Sindri

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< 15 Illumination Parameters Calculators

Number of Lamps Required for Illumination

Go Number of Lamp = (Illumination Intensity*Area of Illumination)/(Luminous Flux*Utilization Factor*Maintenance Factor)

Index of Refraction

Go Refractive Index of Medium 1 = (Refractive Index of Medium 2*sin(Refracted Angle))/sin(Incident Angle)

Luminance

Go Luminance = Luminous Intensity/(Area of Illumination*cos(Illumination Angle))

Luminous Flux

Go Luminous Flux = (Area of Illumination*Luminous Intensity)/(Length of Illumination^2)

Reduction Factor

Go Reduction Factor = Mean Spherical Candle Power/Mean Horizontal Candle Power

Mean Horizontal Candle Power

Go Mean Horizontal Candle Power = Sum of Candle Power/Number of Lamp

Solid Angle

Go Solid Angle = Area of Illumination/(Radius of Illumination^2)

Maintenance Factor

Go Maintenance Factor = Final Illumination/Initial Illumination

Illumination

Go Illumination Intensity = Luminous Flux/Area of Illumination

Mean Hemi-Spherical Candle Power

Go Mean Hemi Spherical Candle Power = Luminous Flux/(2*pi)

Mean Spherical Candle Power

Go Mean Spherical Candle Power = Luminous Flux/(4*pi)

Lamp Efficiency

Go Lamp Efficiency = Luminous Flux/Input Power

Candle Power

Go Candle Power = Luminous Flux/Solid Angle

Lumens

Go Lumen = Candle Power*Solid Angle

Depreciation Factor

Go Depreciation Factor = 1/Maintenance Factor

Illumination Formula

Illumination Intensity = Luminous Flux/Area of Illumination
E_v = F/A

What is the Inverse Square law of illumination?

This law states that the Illuminance (E) at any point on a plane perpendicular to the line joining the point and source is inversely proportional to the square of the distance between the source and plane.

How to Calculate Illumination?

Illumination calculator uses Illumination Intensity = Luminous Flux/Area of Illumination to calculate the Illumination Intensity, The Illumination formula is defined as the number of lumens, falling on the surface, per unit area. It is denoted by symbol E and is measured in lumens per square meter or lux or meter-candela. Illumination Intensity is denoted by E_v symbol.

How to calculate Illumination using this online calculator? To use this online calculator for Illumination, enter Luminous Flux (F) & Area of Illumination (A) and hit the calculate button. Here is how the Illumination calculation can be explained with given input values -> 1.02439 = 42/41.

FAQ

What is Illumination?

The Illumination formula is defined as the number of lumens, falling on the surface, per unit area. It is denoted by symbol E and is measured in lumens per square meter or lux or meter-candela and is represented as E_v = F/A or Illumination Intensity = Luminous Flux/Area of Illumination. 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 & 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.

How to calculate Illumination?

The Illumination formula is defined as the number of lumens, falling on the surface, per unit area. It is denoted by symbol E and is measured in lumens per square meter or lux or meter-candela is calculated using Illumination Intensity = Luminous Flux/Area of Illumination. To calculate Illumination, you need Luminous Flux (F) & Area of Illumination (A). With our tool, you need to enter the respective value for Luminous Flux & Area of Illumination and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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