A modular lighting system having a plurality of light modules, which each have a plurality of light modules accommodating at least one light-emitting diode module. A first and second air-oil separator may define respective first and second separator volumes, each respectively configured to extract oil from air flowing through the volume. The page data can include data of a currently displayed page and data of a total number of pages, and further an operator can set and reset the number of thumbnail images which form one page. The air conveying element has an annular disk that is provided with the basically smooth top side. The manager may receive and display data on a user’s communications. In particular, apparatus and methods enabling programmable interconnection of large numbers of optical fibers having structured and coherent braid representations are provided.