Lamp Efficiency 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%
✖Input power refers to the amount of electrical power consumed by a device or system. It represents the energy input required to operate the equipment and is typically measured in watts or kilowatts.ⓘ Input Power [P_in]			+10% -10%

✖Lamp efficiency refers to the effectiveness of a lamp or light source in converting electrical energy into visible light. It quantifies the ratio of light output (lumens) to electrical power input.ⓘ Lamp Efficiency [η]

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Formula

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Lamp Efficiency

Formula

`"η" = "F"/"P"_{"in"}`

Example

`"0.144828lm/W"="42lm"/"290W"`

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Lamp Efficiency Solution

STEP 0: Pre-Calculation Summary

Formula Used

Lamp Efficiency = Luminous Flux/Input Power
η = F/P_in
This formula uses 3 Variables

Variables Used

Lamp Efficiency - (Measured in Lumen Per Watt) - Lamp efficiency refers to the effectiveness of a lamp or light source in converting electrical energy into visible light. It quantifies the ratio of light output (lumens) to electrical power input.
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.
Input Power - (Measured in Watt) - Input power refers to the amount of electrical power consumed by a device or system. It represents the energy input required to operate the equipment and is typically measured in watts or kilowatts.

STEP 1: Convert Input(s) to Base Unit

Luminous Flux: 42 Lumen --> 42 Lumen No Conversion Required
Input Power: 290 Watt --> 290 Watt No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

η = F/P_in --> 42/290

Evaluating ... ...

η = 0.144827586206897

STEP 3: Convert Result to Output's Unit

0.144827586206897 Lumen Per Watt --> No Conversion Required

FINAL ANSWER

0.144827586206897 ≈ 0.144828 Lumen Per Watt <-- Lamp Efficiency

(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

Lamp Efficiency Formula

Lamp Efficiency = Luminous Flux/Input Power
η = F/P_in

Why is Lamp Efficiency high in fluorescent tube lights?

The lamp efficiency in fluorescent tube light is high because the invisible radiation is converted into visible radiation with the action of phosphor coating inside the tube which reduces the loss light energy.

How to Calculate Lamp Efficiency?

Lamp Efficiency calculator uses Lamp Efficiency = Luminous Flux/Input Power to calculate the Lamp Efficiency, The Lamp Efficiency formula is defined as the ratio between the luminous flux and the power input. It is measured in lumens per watt. Lamp Efficiency is denoted by η symbol.

How to calculate Lamp Efficiency using this online calculator? To use this online calculator for Lamp Efficiency, enter Luminous Flux (F) & Input Power (P_in) and hit the calculate button. Here is how the Lamp Efficiency calculation can be explained with given input values -> 0.144828 = 42/290.

FAQ

What is Lamp Efficiency?

The Lamp Efficiency formula is defined as the ratio between the luminous flux and the power input. It is measured in lumens per watt and is represented as η = F/P_in or Lamp Efficiency = Luminous Flux/Input Power. 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 & Input power refers to the amount of electrical power consumed by a device or system. It represents the energy input required to operate the equipment and is typically measured in watts or kilowatts.

How to calculate Lamp Efficiency?

The Lamp Efficiency formula is defined as the ratio between the luminous flux and the power input. It is measured in lumens per watt is calculated using Lamp Efficiency = Luminous Flux/Input Power. To calculate Lamp Efficiency, you need Luminous Flux (F) & Input Power (P_in). With our tool, you need to enter the respective value for Luminous Flux & Input Power 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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