luminous efficacy

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Related to Lighting efficacy: luminous efficiency, Lumens Per Watt

luminous efficacy

n
1. (Units) the quotient of the luminous flux of a radiation and its corresponding radiant flux. Symbol: K
2. (Units) the quotient of the luminous flux emitted by a source of radiation and the power it consumes. It is measured in lumens per watt. Symbol: ηv or Φv
References in periodicals archive ?
Acuity Brands has been monitoring the continual improvement in photovoltaic technology and the steady increase in LED lighting efficacy and believe these technologies collectively have hit a tipping point.
Comparison of lighting efficacy of LED with other lamp types over a period of 20 years.
Apart from the cost and awareness issues, the other significant challenges in the development of new technologies are lighting efficacy, thermal management, color rendering index (CRI), dimming possibility, uniformity of colors (mainly in case of architectural and commercial applications), and color stability.