1.wide Voltage 2,constant power output 3,high power factor 4,low harmonic wave,good preheating start electromagnetic ballast 2X35W ELETRONIC BALLASTUnique design, slinky appearance, portable ,compact structure. safety and reliability, east to install.safety: use metallic housing, fire-retardant, explosion-proof; fire-retardant, environment-friendly and insert type terminals, easy to install. ...