在许多地方 ,常遇到两只气体放电灯并用的情况(如室内常用双荧光灯管 ,公路、街道、公园、桥头上一根灯杆挂两只高压钠灯或金卤灯 ) ,在这种情况下 ,往往是一只灯分别采用一个电感镇流器。对于后者 ,为了提高其线路功率因数 ,需在每只灯的供电输入端并接一只功率因数补偿电容Ｃ In many places, it is common to encounter two gas discharge lamps (such as indoor double fluorescent tubes, highways, streets, parks, two high pressure sodium lamps or metal halide lamps on a light pole at the bridgehead). In this case Under, often a lamp using an inductor ballast. For the latter, in order to improve its line power factor, the power supply input of each lamp needs to be connected with a power factor compensation capacitor C