0 Nan H Quincy, MA on Apr 12, 2012 Like Clip What is the going rate to have a deck light installed? We have no lighting and no outlet on our deck and wondering the cost. 1 Comment ElectraMedics Electrical ... Dallas, GA The average cost to add a back door outlet or light is in the range from $150-$250 each. The particulars could raise or lower the costs but that is a good range. Good luck too you NOTE: You can drag and drop your photos to reorder them Required Comment Saving...