Dimming the cabin light during night landing and taking off

Why do pilots switch off (or rather dimmed) the airplane cabin light during night landing and taking off? The lights are supposed to be dim, as so you can see, however, they must be dim so that in the event of an emergency, your eyes can adjust quicker to the outside darkness and to reduce the chance or being 'light blind'. Try entering a pitch black room from a normal light room and you'll be unable to see anything for a while, this is reason they dim the lights in the aircraft cabin, to reduce the time this happens.

On a lighter note, some sarcastic flight attendants might say, "We will be dimming the lights to enhance the appearance of our cabin crew."

Dimming the lights also allow for a better view out the window to assess outside conditions (fire, etc.).

Every airline has different regulations regarding to dim or switch all lights off during take off and landing during the night. Also it depends on the cabin crew on most of the airlines as the procedure is always different once dimmed and once completely off and vice versa.

In addition, it seems that dimming the lights is a recommendation, not a regulation.