the wire is fairly cheap (sold by the Foot or Metre) a single pole 20 amp breaker is around 15(CAD), box and actual outlet $1-2 each . depending on how far u have to run the wire will determine total cost, if your running a fair distance id maybe even up the wire to 10-2(higher guage wire) but than again im no electrician, ur other option if you are just using say cfl's or any other low wattage light would be to just junction it into a wire that is run to a circuit with little or no electrical draw on it(just make sure the breaker is off when u do this), would save on the $15 for the beaker and opening up the actuall panel and installing a breaker