100W HIGH PRESSURE SODIUM BALLAST BALLAST TYPE/BALLAST VOLTAGE R-NPF/QUAD TAP LINE VOLTAGE. CURRENT(*1) 120/208/240/277V /2.2/1.4/1.1/1.0 INPUT WATTS 130 OPEN CIRCUIT VOLTAGE 120 DIMENSIONS/IGNITOR/CAPACITOR A- 3 15/16" B- 3 5/8" C- 2 13/16" /ARK-00039 10MFD 280VAC Different sizes are avialable