Fading/fading time

Fading is the gradual input and hideing of a light source.
This can be done by manual or automatic control and is often used in the lighting technology to change the lighting mood and atmosphere in a room.
The fading time relates in the long term that it takes for the light to drop completely or increase to its maximum brightness.
A longer fading time leads to a gentler and flowing transition between the light levels, while a shorter fading time creates a quick change.