Does this mean that if you use a 400W MH ballast and add an ignitor (HQI style) it would fire a 400W HPS? I often have wondered about this...
WillysWonder Reviewed by WillysWonder on . Converting a standard HPS to a MH/HPS Switchable for less than $8.00 Ok if you are not comfortable working with electricity and do not know how to make safe High voltage connections, DO NOT ATTEMPT Now the discalimer is out of the way. OK, you start with a standard HPS ballast and crack it open. Remember that most manufacturers will void the warranty if the ballasts seals are broken. With that said, lets begin the surgery. After the ballast is cracked open you need to locate the ignitor (generally next to the capacitor but smaller) and trace the wires Rating: 5