What is the light that sweeps across the sky at night?

At night, the light that sweeps across the sky is usually a searchlight. Searchlights have powerful light sources and concave mirror, which can focus light in a specific direction for long-distance lighting and searching. Considering the size, weight and convenient operation of the equipment, most searchlights are equipped with tripods or mobile vehicles, and large searchlights even have special trucks as vehicles.

At night, the light that sweeps across the sky is usually a searchlight. Searchlights have powerful light sources and concave mirror, which can focus light in a specific direction for long-distance lighting and searching. Considering the size, weight and convenient operation of the equipment, most searchlights are equipped with tripods or mobile vehicles, and large searchlights even have special trucks as vehicles.