Lumex, Inc. SSP-48TE277U120

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

the angle at which a display can be viewed with acceptable visual performance.

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.