Resolve
RDF Terms

Spectral Luminous Efficiency

The Spectral Luminous Efficiency is a measure of how well a light source produces visible light. It is the ratio of luminous flux to power. A common choice is to choose units such that the maximum possible efficacy, 683 lm/W, corresponds to an efficiency of 100%.

http://en.wikipedia.org/wiki/Luminous_efficacy

$V(\lambda) = \frac{\Phi_\lambda(\lambda_m)}{\Phi_\lambda(\lambda)}$, where $\Phi_\lambda(\lambda_m)$ is the spectral radiant flux at wavelength $\lambda_m$ and $\Phi_\lambda(\lambda)$ is the spectral radiant flux at wavelength $\lambda$, such that both radiations produce equal luminous sensations under specified photometric conditions and $\lambda_m$ is chosen so that the maximum value of this ratio is equal to 1.

The Spectral Luminous Efficiency is a measure of how well a light source produces visible light. It is the ratio of luminous flux to power. A common choice is to choose units such that the maximum possible efficacy, 683 lm/W, corresponds to an efficiency of 100%.

V