Why Use

In many casinos there may be windows close to the passageway or way out, however once you get inside the midsection of the mammoth you will be hard up to see any. This strategy goes as one with having no tickers. When they get you in, they don't need you to have any notion of what is happening in the outside world.
If you somehow managed to see it getting dull outside, or notwithstanding getting light with the sunrise, your inside check would kick in and let you know it's chance to proceed onward and do something else, similar to go to rest.