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Spectral Luminous Efficacy Formula

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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). Check FAQs

K λ = K m \cdot V λ

K_λ - Spectral Luminous Efficacy?K_m - Maximum Sensitivity?V_λ - Photopic Efficiency Value?

Spectral Luminous Efficacy Example

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Here is how the Spectral Luminous Efficacy equation looks like with Values.

Here is how the Spectral Luminous Efficacy equation looks like with Units.

Here is how the Spectral Luminous Efficacy equation looks like.

2561.22 = 55.8 \cdot 45.9

2561.22lm/W = 55.8lm/W \cdot 45.9

2561.22 = 55.8 \cdot 45.9

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Spectral Luminous Efficacy Solution

Follow our step by step solution on how to calculate Spectral Luminous Efficacy?

FIRST Step Consider the formula

K λ = K m \cdot V λ

Next Step Substitute values of Variables

∴

K λ = 55.8lm/W \cdot 45.9

Next Step Prepare to Evaluate

∴

K λ = 55.8 \cdot 45.9

LAST Step Evaluate

∴

K λ = 2561.22lm/W

Spectral Luminous Efficacy Formula Elements

Variables

Spectral Luminous Efficacy

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).

Symbol: K_λ

Measurement: Luminous EfficacyUnit: lm/W

Note: Value can be positive or negative.

Formulas to find Spectral Luminous Efficacy

Maximum Sensitivity

The maximum sensitivity for photopic vision, which occur at 555nm.

Symbol: K_m

Measurement: Luminous EfficacyUnit: lm/W

Note: Value can be positive or negative.

Formulas to find Maximum Sensitivity

Photopic Efficiency Value

Photopic efficiency value of the photopic spectral luminous efficiency function for that wavelength.

Symbol: V_λ

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Photopic Efficiency Value

Other formulas in Methods of Lighting category

Go Specific Consumption

S.C. = \frac{2 \cdot P in}{CP}

Go Utilization Factor of Electrical Energy

UF = \frac{L r}{L e}

Go Luminous Intensity

I v = \frac{Lm}{ω}

Go Beer-Lambert Law

I t = I o \cdot \exp (- β \cdot c \cdot x)

How to Evaluate Spectral Luminous Efficacy?

Spectral Luminous Efficacy evaluator uses Spectral Luminous Efficacy = Maximum Sensitivity*Photopic Efficiency Value to evaluate 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 evaluate Spectral Luminous Efficacy using this online evaluator? To use this online evaluator for Spectral Luminous Efficacy, enter Maximum Sensitivity (K_m) & Photopic Efficiency Value (V_λ) and hit the calculate button.

FAQs on Spectral Luminous Efficacy

What is the formula to find Spectral Luminous Efficacy?

The formula of Spectral Luminous Efficacy is expressed as Spectral Luminous Efficacy = Maximum Sensitivity*Photopic Efficiency Value. Here is an example- 2561.22 = 55.8*45.9.

How to calculate Spectral Luminous Efficacy?

With Maximum Sensitivity (K_m) & Photopic Efficiency Value (V_λ) we can find Spectral Luminous Efficacy using the formula - Spectral Luminous Efficacy = Maximum Sensitivity*Photopic Efficiency Value.

Can the Spectral Luminous Efficacy be negative?

Yes, the Spectral Luminous Efficacy, measured in Luminous Efficacy can be negative.

Which unit is used to measure Spectral Luminous Efficacy?

Spectral Luminous Efficacy is usually measured using the Lumen Per Watt[lm/W] for Luminous Efficacy. Lumen Per Kilowatt[lm/W] are the few other units in which Spectral Luminous Efficacy can be measured.

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Spectral Luminous Efficacy Formula

Spectral Luminous Efficacy Example

Spectral Luminous Efficacy Solution

Spectral Luminous Efficacy Formula Elements

Other formulas in Methods of Lighting category

How to Evaluate Spectral Luminous Efficacy?

FAQs on Spectral Luminous Efficacy

Variable Name