Question

the unit of luminous efficiency of electric bulb is _______

Answer 1

In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye.

The SI unit of luminous intensity is the candela (cd), an SI base unit.

Answer 2

${\huge{\mathfrak{lumens per watt}}}$