Q. Lumen per watt is the unit of __.

A
Light flux
B
Luminous efficiency
C
Luminous intensity
D
Brightness
Solution:

Luminous efficiency is the measure for efficiency with the generation of light, and is specified in lumens per watt (lm/W). Lamp luminous efficiency designates the ratio of emitted light quantity to electrical power consumption of an open distribution lamp in standard ambient conditions.

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