You need to have a special ballast and socket to run an hps bulb. It does not run in a standard light socket. Sorry, I would suggest looking around ebay for a good light deal, Buy a complete light kit with bulb, ballast & Socket.

Good Luck

JRF
johnnyrocketfuel Reviewed by johnnyrocketfuel on . High Pressure Sodium Light problem Hey everyone. Today I bought a 150watt Philips high pressure sodium clear bulb hoping to use it with my plant. I got home and tried it out... and it didn't work. Is clearly not broken... then I read it doesn't work with normal light sockets... then I saw "fpr use only with ANSI S55 Ballast. I have no idea what that is. can someone help me out with this light? Rating: 5