Traditional Culture Encyclopedia - Hotel franchise - The building is half built, and there will be a row of green laser lights at the top at night. What is this for? I use pictures and strokes during the day.

The building is half built, and there will be a row of green laser lights at the top at night. What is this for? I use pictures and strokes during the day.

In two cases, one is used for leveling during construction.

Laser levels example

One case is laser decoration as a landmark building, similar to this one.

Landmark building laser lamp