Electronic ballast for fluorescent lamps: 18/30/36W for single or double tubes. 200~220V, 50/60Hz. With High Power factor 0.98C. Case type:258*40*32mm or 327*40*32mm Certification:TUV,CCC We are a factory of electronic transformer,electronic ballast.we can support our products with superior quality and most competitive price. Our product has the characteristics of energy saving, low voltage igniting, high power factor, Low harmonic, long life, flicker free and no noise, easy to install and use etc. And it has the approval of the international certifications of TUV, EMC and CE.