PFO 175 watt PULSE START metal halide ballast. PFO PULSE START metal halide ballasts utilize tar style ballast (core and coil design) for reliable operation. Single PULSE START ballasts feature 120 volt 6 foot long power supply cord. Ballast housing is an extruded aluminum heat sink enclosure for maximum heat dissipation. Ballast has an independent on-off switch. PFO style quick disconnect for maximum versatility in socket and/or hood mounting configurations. PULSE START ballasts use an ignitor to operate all types of single ended lamps. PULSE START ballasts are recommended for use with Aqualine Buschke and Ushio bulbs for reliable bulb ignition. Dimensions: 8.5 inches long by 7.5 inches wide by 6.25 inches high. BALLAST COMES WITH BUILT IN FEMALE QUICK DISCONNECT SOCKET. REQUIRES PFO LAMP CORD (SOLD SEPERATELY, PART # LT-PFQD8 ) WITH PFO MALE QUICK DISCONNECT OR PFO PENDANT / REFLECTOR ASSEMBLIES WITH INTEGRAL LAMP CORD (SOLD SEPERATELY) TO PLUG INTO BALLAST.