Does higher luminous intensity mean higher light output?
Almost all indicator-type LEDs are rated by their manufacturers in terms of luminous intensity in candelas, rather than light output in lumens. Luminous intensity is a function of the angle from which an LED is seen, so this value should be considered carefully when used to characterize the light output of a particular LED. Two LEDs with the same luminous flux output can have very different peak luminous intensities, if they are designed to produce different beam angles. A narrower beam angle means a higher maximum luminous intensity for the same light output. LED packages are available in a range of beam angles from very narrow (near 6°) to quite wide (more than 100°); most illumination-grade LEDs are rated in terms of light output in lumens.
When using narrow-beam LEDs, it is important to note that small variations in mounting or aiming angle can have a large impact on the appearance of an array of these devices, if the array is designed to be viewed directly.