ROBERTSON 3P10005 BLU0035A04900 mHID, Ballast, High Pressure Sodium, 35 Watt (S76), NPF, 120Vac., 60Hz, Reactor, Kit Equivalent to: PHILIPS-ADVANCE 71A7707, OSRAM SYLVANIA LU35/120R, UNIVERSAL 1233-25IU Equivalent to: HATCH GS35ARNCK, KEYSTONE HPS-35R-1 Save 28% and order the Quik-Pak of 10 individually packaged units: 2P10005 BLU0035A04900 Two Year Factory Warranty-ONLY if the Amazon Seller is ROBERTSON Worldwide. Take advantage of ROBERTSON's 60 years of electronic design and quality manufacturing experience