PFO Dual 150 watt HQI metal halide ballast. PFO HQI metal halide ballasts utilize tar style ballast (core and coil design) for reliable operation. Dual HQI ballasts feature two 120 volt 6 foot long power supply cords. Ballast housing is an extruded aluminum heat sink enclosure for maximum heat dissipation. Ballast has two independent on-off switches. PFO style quick disconnects for maximum versatility in socket and/or hood mounting configurations. Ballast will operate all types of HQI double and single ended lamps as well as all types of single ended metal halide lamps. Dimensions: 18 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.