[media = http: //www.youtube.com/watch? v = -p2NY2BhIFk]
Caught in a place where there is no outlet, but there is only a light bulb? Make a portable outlet, screw bulbs into the lampholder and use electricity!
Such device It will be useful for builders and repairmen, it is often necessary to connect a drill and other tools, and there are no sockets nearby. For example, this situation often happens when working in the stairwell, but in each staircase there is a light bulb and we screw a home-made socket, then an extension cord - no worries, we power up any tool!
Another ceiling socket from an energy-saving light bulb will be useful to students and is not interchangeable on business trips and travels. In general - the thing you need!