You searched for: “luminous efficiency
luminous efficiency (s) (noun), luminous efficiencies (pl)
The ratio of the radiant energy sensed by the average human eye at a particular wavelength to that received: The ophthalmologist, Dr. McMahon, was requested to determine the luminous efficiency of his patient, Mr. Jones, who appeared to have difficulty perceiving particular colors.
This entry is located in the following unit: lumen-, lumin-, lum- (page 4)