Description: ST723 HID BALLAST TESTER Watts: 70 to 1500Base: E40Package Qty: 1Case Qty: 1Add Info: 70-1000W HPS,MV,MH MOGUL BASE SCREW TESTER INTO MOGUL BASE LAMPHOLDER AND TURN POWER ON TESTER CHECKS THE STARTING PULSE VOLTAGE AND THE OPEN CIRCUIT VOLTAGE (OCV) OF THE BALLAST TESTER IS COMPATIBLE WITH HID BALLAST (HPS AND MH LAMPS) 70W UP TO 1500W