A floodlight is a lamp that specifies that the illuminance on the illuminated surface is higher than that of the surrounding environment. Also known as spotlight. In general, 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.
The floodlight consists of three parts: optical part, mechanical part and electrical part. The optical components are mainly reflectors and light limiting grating. The mechanical components are mainly the shell, the focusing mechanism for fixing and adjusting the position of the light source, the bracket and base for fixing the lamp, and the parts with angle indication for adjusting the light beam projection direction of the lamp. For most of the airtight floodlights, the mechanical parts include protective glass and various sealing rings. According to the needs of the use environment, some are equipped with metal mesh covers. The projector with good performance is also equipped with air filter. The electrical components are mainly ballasts, capacitors, flip-flops (according to the needs of light sources) and so on.