The next step is to drill a hole to hold the switch. Mine happens to be 1/2". The diameter of the hole should be a hair bigger than the threads on the switch so that the threaeds will fit through but small enough so that the little nut will hold it in. You also want to use some care here as to not puncture the ignitor or capacitor with your drill. I put my switch behind the handle so that in the future it is harder to accidentally hit the switch.
djsethall Reviewed by djsethall 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