Do it yourself.
You can get all the information on how to do it right off the internet.
Turn off the current.
Tap into an existing outlet box and connect the new wire to the new light. (Screwdriver required)
Run the new wire from there up the wall and outside to a junction box with a switch on an all weather box so you can turn your light off and on outside.
From the junction box run another wire to the outlet box you have mounted for the light itself.
Mount and connect the all weather light into that box.
Make sure the circuit is grounded.
Very simple and should take no more then a Saturday afternoon and six beers to complete.
