ballast,unique design, quiet, noiseless, low temperature rise and high-quality and inexpensive No.: BD006Name: C Inductance Super-quiet BallastItem No.: 20W-40WBrand: CHANGXINGWANG(C)Characteristics:1.allowed noise is about70%35Db,it as quite as cant be felt.2.short magnetic circuit,little waste,low temperature rise.3. high adaptation for power supply and voltage.4. unique design, adopt T, U to ...