Agilent HCMS-3906

the process by which an electronic or electrical device produces heat (energy loss or waste) as an undesirable derivative of its primary action.

the amount of voltage needed to get current to flow across a diode.

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.