American Opto Plus LED L171L-LWC-TR

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

Current which flows upon application of forward voltage.

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.

affect how much visible light reaches people's eyes, how well people see other colors and how well they see contrasts.