Spectral Luminous Efficacy Calculator

✖The maximum sensitivity for photopic vision, which occur at 555nm.ⓘ Maximum Sensitivity [K_m]			+10% -10%
✖Photopic efficiency value of the photopic spectral luminous efficiency function for that wavelength.ⓘ Photopic Efficiency Value [V_λ]			+10% -10%

✖Spectral Luminous Efficacy is a measure of how well a light source produces visible light. It is the ratio of luminous flux to power, measured in lumens per watt (lm/w).ⓘ Spectral Luminous Efficacy [K_λ]

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Formula

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Spectral Luminous Efficacy

Formula

`"K"_{"λ"} = "K"_{"m"}*"V"_{"λ"}`

Example

`"2561.22lm/W"="55.8lm/W"*"45.9"`

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Spectral Luminous Efficacy Solution

STEP 0: Pre-Calculation Summary

Formula Used

Spectral Luminous Efficacy = Maximum Sensitivity*Photopic Efficiency Value
K_λ = K_m*V_λ
This formula uses 3 Variables

Variables Used

Spectral Luminous Efficacy - (Measured in Lumen Per Watt) - Spectral Luminous Efficacy is a measure of how well a light source produces visible light. It is the ratio of luminous flux to power, measured in lumens per watt (lm/w).
Maximum Sensitivity - (Measured in Lumen Per Watt) - The maximum sensitivity for photopic vision, which occur at 555nm.
Photopic Efficiency Value - Photopic efficiency value of the photopic spectral luminous efficiency function for that wavelength.

STEP 1: Convert Input(s) to Base Unit

Maximum Sensitivity: 55.8 Lumen Per Watt --> 55.8 Lumen Per Watt No Conversion Required
Photopic Efficiency Value: 45.9 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

K_λ = K_m*V_λ --> 55.8*45.9

Evaluating ... ...

K_λ = 2561.22

STEP 3: Convert Result to Output's Unit

2561.22 Lumen Per Watt --> No Conversion Required

FINAL ANSWER

2561.22 Lumen Per Watt <-- Spectral Luminous Efficacy

(Calculation completed in 00.020 seconds)

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Created by Aman Dhussawat

GURU TEGH BAHADUR INSTITUTE OF TECHNOLOGY (GTBIT), NEW DELHI

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Go Spectral Reflection Factor = Reflected Spectral Emission/Spectral Irradiation

Spectral Luminous Efficacy

Go Spectral Luminous Efficacy = Maximum Sensitivity*Photopic Efficiency Value

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Go Spectral Luminous Efficacy = Maximum Sensitivity*Photopic Efficiency Value

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Go Luminous Intensity = Lumen/Solid Angle

Spectral Luminous Efficacy Formula

Spectral Luminous Efficacy = Maximum Sensitivity*Photopic Efficiency Value
K_λ = K_m*V_λ

What is CIE luminous spectral e fficiency?

The International Commission on Illumination (CIE) uses the spectral luminous efficiency function V(λ) to describe the light brightness that humans can perceive. It states that people are more sensitive to light in the middle wavelengths than either short or long wavelengths.

How to Calculate Spectral Luminous Efficacy?

Spectral Luminous Efficacy calculator uses Spectral Luminous Efficacy = Maximum Sensitivity*Photopic Efficiency Value to calculate the Spectral Luminous Efficacy, The Spectral Luminous Efficacy formula is defined as a luminous efficiency function or luminosity function represents the average spectral sensitivity of human visual perception of light. Spectral Luminous Efficacy is denoted by K_λ symbol.

How to calculate Spectral Luminous Efficacy using this online calculator? To use this online calculator for Spectral Luminous Efficacy, enter Maximum Sensitivity (K_m) & Photopic Efficiency Value (V_λ) and hit the calculate button. Here is how the Spectral Luminous Efficacy calculation can be explained with given input values -> 2561.22 = 55.8*45.9.

FAQ

What is Spectral Luminous Efficacy?

The Spectral Luminous Efficacy formula is defined as a luminous efficiency function or luminosity function represents the average spectral sensitivity of human visual perception of light and is represented as K_λ = K_m*V_λ or Spectral Luminous Efficacy = Maximum Sensitivity*Photopic Efficiency Value. The maximum sensitivity for photopic vision, which occur at 555nm & Photopic efficiency value of the photopic spectral luminous efficiency function for that wavelength.

How to calculate Spectral Luminous Efficacy?

The Spectral Luminous Efficacy formula is defined as a luminous efficiency function or luminosity function represents the average spectral sensitivity of human visual perception of light is calculated using Spectral Luminous Efficacy = Maximum Sensitivity*Photopic Efficiency Value. To calculate Spectral Luminous Efficacy, you need Maximum Sensitivity (K_m) & Photopic Efficiency Value (V_λ). With our tool, you need to enter the respective value for Maximum Sensitivity & Photopic Efficiency Value 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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