When the light switch needs to be changed out or replaced our first instinct is that we have to call an professional who is able to come and do it for us. This is a good way to handle it - but expect to pay around $40 or more for them to come to your house and spend ten minutes to set up something you can simply do yourself.Before you start turn the power to the switch off. You will be able to do this from the power circuit or fuse box. When that is done you will have to take off the cover plate over the existing switch.Now take out the screws securing the switch into the wall box. Carefully remove the switch by pulling on the tabs on the top and bottom. Utilize a voltage tester and test both of the lines connected to the unit. This will tell you whether or not you were successful at turning the power off. Loose the screw on top and remove the wire. Twist it up and away from the unit and loosen the bottom screw. Bend it down from the unit and loose the screw securing the ground wire. Now get rid of the old switch and throw it away.Undo all of the screws that are 250W Stadium Flood Light 15 Degree Factory on the new unit and wind the ground wire round the screw and secure it. If the wires are in good condition than you will have the ability to wrap them around the bottom wire and screw them in.Now twist electrical tape around the new light switch. Be sure that the terminals are covered so that the ground wires do not touch. Gently push the wires into the wall box and fix the mounting screws. Screw the cover plate in and turn the power back on.