We've made up a mains light, a four or five metre correct size flex, with a three pin plug on one end, switched bulb-holder on the other, and a normal domestic lampshade. We hook the wire over the awning pole, slip the lampshade end through the loop (which holds it in place) thread the wire around the awning pole a couple of times, and then drop the end down and plug in to our external socket. During the day we unplug the plug from the socket. It cost nothing as we had the wire, the three pin plug, the switched lamp bulbholder and the shade, and it works perfectly. On really dry days in France we've also been known to hook it over a tree branch if we don't have the awning up - removing it when we go to bed, obviously.