... ,RoHS 2.Power:8w,14w,21w,28w,35w,54w 3.PF>99%,THD<10% 4.High quality balalst, 30000hr ceiling light fixtureCeiling ... >99%),low THD(<10%)4.Use tri-phosphor powder fluorescent lamp,more brightness,high efficiency5.No noise,no flicker,low work ... .Long lifetime,>8000hrs,energy saving up to 45%7.Installation:Ceiling mounting, series connectionApplication: House lighting, shopping mall,refrigeratory,show case ...