ROBERTSON 3P10062 CLU0400H04912 M HID CWA, mBallast Kit, 400 Watt, S51 High Pressure Sodium Lamp, 120/208/240/277Vac, 60Hz, HPF, with Bracket, Round Ignitor, Round Dry Film Capacitor (Replaces Model CLU0400H04912 ROBERTSON 3P10012) Equivalent to Philips-Advance 71A8493, 71A8473, Osram LU400/Multi-Kit, Universal S400MLTAC5M-500K Equivalent to Keystpne HPS-400A-Q-HP, General Electric GES400MLTAC4-5, Hatch GS400MLTCWCAK Equivalent to Fulham HHHPSMLT4400D Take advantage of Robertson's 60 years of electronic design and quality manufacturing experience. Go to RobertsonDirect.com for complete technical data.