Efficacy

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Efficacy

In lighting design, a measure of the luminous efficiency of a specified light source, expressed in lumens per watt. For daylighting, this is the quotient of visible light incident on a surface to the total light energy on that surface. For electric sources, this is the quotient of the total luminous flux emitted by the total lamp power input.

luminous efficacy

The ratio of the total emitted luminous flux, in lumens, to the total electric power consumption in watts.
References in periodicals archive ?
2013), two variables may be employed to assess the efficaciousness of a chemical treatment in the control of parasite infestations: percentage of fish mortality and decrease in the number of parasites.
The architects of these models are concerned with questions of efficaciousness and effectivity--how successful the sender is in conveying her or his message to the receiver in order to secure the intended effect.
In providing this interpretation of its own jurisprudence, the SCC disavowed any reliance at all on the relative efficaciousness of provincial and federal approaches to a matter.
The message should produce accurate perceptions of the threat of the illness, as well as provide indications of the efficaciousness of preventive measures.
The authors also encourage spa participants to consult their physician before attending this or similar programs and research the center vigorously for safety and efficaciousness.
For the CE mark, you only have to show the product is safe; the efficaciousness of the product comes later in post-marketing studies.
The underlying premise for strength-based models is that motivation for sexual behavior can often be linked to a common human need, such as affiliation, mastery, competence, efficaciousness, emotional intimacy, or physical pleasure.
I totally believe in the efficaciousness of the "Islamic feminisms" project; however, at the same time, I am deeply convinced that this "democratization of ijtihad" (as it has been defined by some scholars (2)) though revolutionary and effective, is not enough to subvert the status quo.
Physicians in general are not aware of the efficaciousness of supplements addressing glycemic control and hence unlikely to recommend nutritional-based solutions.
With few exceptions, however, it is only the efficaciousness of interventions that has been tested.
The efficaciousness of violence is a double-edged sword, since violence is what registers in today's society and it is also what is most co-optable as a form of subjective violence by the media, which covers not the socio-economic conditions (the systemic violence) that gave rise to the problems at hand, but the scenes of destruction and transgression, such as car burnings and looting.
However, PPP, its coalition partner Mutahida Qaumi Movement (MQM), and PML-N criticized Imran Khan, questioning the efficaciousness of his rally in the long run.