The present invention relates to a light trunking system, comprising: at least one trunking rail (6) for fastening components (7 . . . 13) of the light trunking system (1) to the trunking rail (6); electrical lines (L3, L4), which run in the trunking rail (6) and can be contacted by the components (7 . . . 13) in order to supply power to the components (7 . . . 13); a data terminal (D1, D2) for receiving data; and a first adapter (16), which is connected to the electrical lines (L3, L4) and to the data terminal and is designed to transmit data received by the data terminal (D1, D2) to a second adapter (17) via the electrical lines (L3, L4) by means of a modulation method.