What light does the construction lamp around the tower crane use for lighting?
A searchlight is a device with a powerful light source and a concave mirror that focuses light on a specific direction for use in remote lighting and searching.
The construction lights around the tower crane are called searchlights.
A large beam of light can be obtained by concentrating a beam of light in a very small solid angle (usually less than 2 degrees) with a mirror or lens. Considering the size, weight and ease of operation of the device, most of the searchlights are equipped with a tripod or movable carrier, and large searchlights even have special trucks as carriers.
