thanks man for replaying i will try like you say. i am very pissed off of those merchants here, no one knows what is MH or HPS lights or ballasts, even more they dont know what a ballast is they call the whole ballast (capacitor, transformer and igniter ) just capacitor LOL. for them 400W light i 400W light no mater what light just the wattage to be right. i was asking do you have 400W HPS light bulb and ballasts they say yes we have 400W light bulb. LOL LOL LOL