Inside the tower is a workstation where one person decides what will go on the sign. And this is more complicated than it seems. For example, there are holes in the sign that accommodate windows, and when an ad goes up, it often needs to be adjusted so the words don't land in those holes. To this end, the operator can move pieces around. To help, there's a camera located in an office on the other side of Times Square that lets the operator see what the sign looks like to the outside world.
From the operator's station, data flows to a whole rack of computers and controllers that break down the image and figure out how every individual pixel must be lit. These machines format the data that goes to the tiles, and the tiles then decode the data to create the correct image.
The sign itself uses about 500,000 watts when all the LEDs are on. That doesn't count the power used by the 12 air conditioning units. The tiles and their LEDs turn all of that power into light. The light is able to produce an stunning, bright color display that can be clearly seen both day and night.
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