... earth wire (Aluminum material) 2)White coated body 3)Power:8w,14w,21w,28w,35w 4) high efficiency Features:1.Material:aluminum ... standard;can pass EMC and RoHs.3.High quality:PF>0.99,THD<10%,Usual quality:PF>0.95,THD<30%4.Use tri-phosphor ... ,refrigeratory,show case,hotel,office etc T5 Batten fixture with high quality electronic ballast