... quality balalst, 30000hr ceiling light fixtureCeiling light fixture Power: 2*14w,2*28w,2*35w,2*54wCeiling light fixture Features:1. ... THD(<10%)4.Use tri-phosphor powder fluorescent lamp,more brightness,high efficiency5.No noise,no flicker ... 45%7.Installation:Ceiling mounting, series connectionApplication: House lighting, shopping mall,refrigeratory,show case,hotel,office etc ceiling light fixture (2 ...