ceiling light fixture 1.Complied TUV-CE,RoHS 2.Power:8w,14w,21w,28w ... ,35w,54w 3.PF>99%,THD<10% 4.High quality balalst, 30000hr ceiling ... .Adopt high quality ballast,comply with 3C,TUV-CE standard3.High Power Factor(PF>99%),low THD ... lifetime,>8000hrs,energy saving up to 45%7.Installation:Ceiling mounting, series connectionApplication: House lighting, shopping mall, ...