A lamp that projects light so that the illuminance on a designated illuminated surface is higher than that of the surrounding environment, also known as a spotlight. Generally, it can aim at any direction and has a structure that is not affected by climate conditions. It is mainly used in large-area operation field, building outline, stadium, overpass, monument, park, flower bed, etc.
Therefore, almost all outdoor large area lighting lamps can be regarded as projection lamps. The angle of the outgoing beam of the floodlight is wide or narrow, and the variation range is between 0 ° and 180 °. The searchlight is the one with narrow beam.