... Ballast Electronic Ballast for 14W, 21W, 28W, 2*14W, 2*21W, 2*28W Specifications: We can manufacture as per ... ≥10000≤15%210*30*20White with blackPlasticSquareCTKKT5-BL-2*142*14200-240≥0.98≥10000≤15%250 ... *30*25White with blackPlasticSquareCTKKT5-BL-2*212*21200-240≥0.98≥10000≤15%250 ... 1,Shell novel design, compact structure, light weight 2,Preheat type start, no flash, no noise frequency3 ...