Light Boxes

• The first thing to consider is the light boxes. To install outdoor lighting on the sides of a home, or shed, you need to have weatherproofed lighting boxes installed over the outdoor circuitry. This prevents water from getting inside. Rain and runoff are really quite adept at getting into tight spots. There are a few ways to prevent it. After you install the weatherproof light boxes, seal them. It is wise to replace older light boxes with new ones. This requires shutting off the circuits to the outdoor lights, disconnecting the old light fixtures and removing the light box. Then install the new one in the existing space, and seal with outdoor caulk or silicone.
  
  

Using the Right Replacement Lights

• Another important consideration is to match the fixture to the existing one. The fixture should run on the same voltage as the existing fixture and be up to code. Check your local building codes for homes to be sure the light fixture you are buying meets or exceeds the codes. The fixture itself should also be made for outdoor use. If you aren't sure, check the fixture socket or encasement. It should prevent, if not completely seal out, water from entering. It must also be built to withstand high winds.
  
  

Wiring, Cable and Installation

• All cable used in an outdoor light should meet UL (Underwriter's Laboratory) codes. In addition, it must meet your local codes. No wiring should be exposed to the elements. One way to prevent this is to run the wire through electrical conduit. Check your codes for the proper conduit.
  
  Installing the lights can be done in one of a few ways. First, cut off the power to the light by switching off the circuit. Next, mount the molding to the wall, running the wire through the molding. On vinyl siding, this can be placed right over the siding around the light box. Or the siding can be cut around the molding and trim installed on the edge of the siding. Next run the wire through the light mount bracket and install this to the molding. The light is attached to the bracket using the hardware the manufacturer provides. Most outdoor lights are grounded by connecting the ground wire to the bracket. In some cases you will need to install a grounding circuit.