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<br>Luminous efficacy is a measure of how effectively a gentle supply produces visible mild. It is the ratio of luminous flux to energy, measured in lumens per watt within the Worldwide System of Units (SI). Relying on context, the power will be either the radiant flux of the source's output, or it can be the entire energy (electric energy, chemical vitality, or others) consumed by the source. Which sense of the time period is intended must often be inferred from the context, and is typically unclear. Not all wavelengths of gentle are equally seen, or equally effective at stimulating human vision, as a result of spectral sensitivity of the human eye |
