Motion-sensing lights are a must for home security. Since burglars prefer to work in the dark, they'll be more likely to shy away from a well-lit yard at night. You don't want your lights to stay on 24/7 and suck up energy, though. That's why motion-sensing lights make sense. You can buy them at the local hardware store and do the installation yourself. Here's a look at how to replace your current outdoor lights with security lights:
Remove the Existing Fixture
Find the circuit on your fuse box that controls the lights that you're going to replace. Turn the breaker off. Go outside and remove the bulb and fixture to expose the wires and junction box. Use a voltage tester to make sure the power is off, then remove the old fixture completely. Separate the wires, reactivate the circuit, and test them to make sure power is flowing properly. Turn the power back off. Wrap the exposed wires with electrical tape, leaving the last 1.5" bare.
Connect the Fixture
On the new light unit, separate the black, white, and bare/green grounding wires. Strip 1.5" of insulation from the ends of each, then connect the wires. Black to black, white to white, and ground to the junction box ground screw. Using a wire nut, wwist the ends of each wire pair together, then reactivate the circuit. Use the foltage tester to make sure power is flowing to and from the fixture. Then turn off the power again and connect each wire pair with a wire nut, and cover them with tape to waterproof your splice.
Mount the Fixture
Tuck the now-connected wires into the junction box and put the fixture housing over it. Mount the fixture to the box with the provided screws. It's important that all the wires are completely contained and protected by the housing fixture.
Install the Bulb
Lastly, you will install the bulb. Wear lightweight gloves to install the fixture's halogen bulb. Next seal the housing and reactivate the circuit. Test the light at night with the switch first, and then, leave the switch in the ON position. Don't move, and watch for the light to turn off in a few minutes. It should reactivate when you move. Use the manufacturer's instructions to adjust the motion sensors as necessary.
Source: Garage Solutions