It is impossible to explain the plug-in system in two sentences and still do it justice. There is just too much refinement and innovation behind that idea to discuss it in a few simple words. Suffice it to say that, once you settle for the plug-in system of a manufacturer, whole new worlds of lighting compositions become available. You can switch lamps around without any effort, a few quick movements are enough. If you want more information, please just send us a quick e-mail and we can give you more details.