Dimming LEDs offer the following advantages:
Saving energy, because less energy is used for reduced output levels.
Extended life; the electronic components run cooler. This not only extends the life of LEDs but also increases the life of the phosphor coating that is used to produce white light.
Helps designers create ambient lighting presets to create mood settings.
Flexibility in usage of space. A brightly lit space for reading or an office space can turn into a presentation/conference area by dimming.
Increases productivity by individual control to reduce eye strain and fatigue or to improve concentration.