Classification Of Floodlights
Rotationally symmetric: the lamp adopts a rotationally symmetric reflector, and the symmetry axis of the light source with rotationally symmetric light distribution is installed along the axis of the reflector. The isointensity curve of this kind of lamps is concentric. When this kind of projection lamp is illuminated by a single lamp, it gets an oval spot on the illuminated surface, and the illumination is uneven; However, when lighting with multiple lamps, the light spots are superimposed on each other, which can produce a satisfactory lighting effect. For example, hundreds of rotationally symmetrical projection lamps are often used in stadiums, which are installed on the towers around the stadium to obtain high illumination and high uniformity lighting effects. Two symmetries: the isointensity curve of this kind of projection lamp has two symmetrical planes. Most lamps adopt symmetrical cylindrical reflectors, and the linear light source is installed along the cylindrical axis. One symmetry: the isointensity curve of the lamp has only one symmetrical plane. The lamp adopts a grid with asymmetric cylindrical reflector or symmetric cylindrical reflector plus * light. The most typical is the sharp cut-off block retracted light distribution. This kind of light intensity distribution, a single lamp can obtain a more satisfactory illumination distribution. Asymmetrical shape: the isointensity curve of this kind of lamps has no symmetrical plane. It mainly adopts mixed light lamps with different kinds of light sources with large differences in light intensity distribution and special lamps designed according to the specific lighting requirements of the place of use.
Development Of Projection Lamp
The projection lamp can be installed and used individually or combined with multiple lamps and installed on a pole above 20m to form a high pole lighting device. In addition to the features of beautiful appearance, centralized maintenance, reduction of lamp poles and floor area, the biggest advantage of this device is its strong lighting function. When light is projected from a high place, the space brightness of the environment is high, and the light coverage is large, giving people a feeling similar to day, so it has high lighting quality and visual effect. In order to meet the safety performance requirements for outdoor use, the shell protection grade of the floodlight should be open. In order to improve the durability of lamps and reduce the maintenance workload, people pay more and more attention to the development of closed projection lamps with high one-time investment cost, and their shell protection grade is IP55. In order to further improve the light output ratio of lamps, reflectors tend to adopt block panel reflectors that are conducive to reducing the light blocking of light sources and multi focus reflectors that meet special lighting requirements; The surface treatment of reflective surface tends to adopt new materials and new processes to obtain a reflectance of more than 96%. In order to reduce the weight of lamps and reduce the consumption of metal materials, the lamp shell will develop to a plastic shell with high temperature resistance, high mechanical strength and aging resistance.
