Security floodlight illuminates the exterior of a home with a brilliant beam of light, providing protection against an intruder sneaking up under the cover of darkness. To install a security floodlight yourself, you’ll need to assemble some common household tools. You can purchase the security light at a home and garden shop or at select hardware stores.
Determine the outside location where you will be mounting the security floodlight. Typical locations include the area above a garage or on the back of the house facing the backyard.
Trip the circuit breaker at the fuse box to cut off power to the electrical junction box inside the wall at the location where you will be installing the security floodlight.
Place a ladder next to the wall so you can reach an existing light fixture or cover plate on the wall where the electrical junction box is located.
Remove the screws from around the light fixture or cover plate, using a Phillips screwdriver. Pull the light fixture or cover plate off the wall. Unscrew the electrical nut connectors from the twisted pairs of wires that are now revealed in a hole in the wall.
Separate the wires from inside the hole that are wound around the wires on the back of the light fixture. Set the light fixture aside. If you're removing a cover plate instead, ignore all of the steps relating to the light fixture but remove the electrical nut connectors from over the ends of the wires inside the hole.
Place the security floodlight on a work surface. Strip 1/2 inch of insulation from the ends of the three wires attached to the back of the security flood light, using wire strippers. You can ignore this step if the wires are already prestripped.
Wind the end of the black wire from the security floodlight around the end of the black wire from the hole. Wind the end of the white wire from the security floodlight around the end of the white wire from the hole. Screw an electrical nut connector onto each pair of twisted wires.
Aim a flashlight into the hole so you can see the screw at the bottom right corner of the electrical junction box. Loosen the screw, using a Phillips screwdriver. Wind the end of the remaining wire attached to the security floodlight around the screw. Tighten the screw. Push the wiring inside the hole.
Place the security floodlight against the wall, over the hole. Screw wood screws through the predrilled holes in each side of the security flood light and into the wall, using the Phillips screwdriver.
Screw a floodlight into the bulb socket on the front of the security floodlight. Rotate the neck of the bulb socket so the floodlight is pointed in the direction of the area you want to be illuminated. Put the ladder away and return the power at the fuse box.