ballast,unique design, quiet, noiseless, low temperature rise and high-quality and inexpensive No.: BD006Name: C Inductance Super-quiet BallastItem ... .2.short magnetic circuit,little waste,low temperature rise.3. high adaptation for power supply and voltage.4. unique design, adopt ... T, U to press tinertoy iron core high speed, structure secure. Magnetic Ballast 18/20/36/40W