... Features & Benefits Of T5 lighting Electronic Ballast :1. Metal shell, with insulation protection layer,safe using, good looking.2. ... >0.98, THD<20%.4. Over 30000Hours Life, low maintenance replacement cost.5. Comply with CCC, CE Certi. standard.----------------- ... Brand monopolize regional proxy, do not set other agencies. 4. Experienced workers, skilled staffs, beautiful and clean workshop. ...