Abstract: The modular lighting tube according to the present invention comprises a transparent or translucent and flexible tubular member, a pair of circuit wires provided within said tubular member, across which a plurality of light emitting means are connected, electric terminals for said pair of circuit wires and mechanical connector members provided on opposite ends of said tubular member, wherein the last-mentioned two components are directly connectable to the ends of the adjacent modular lighting tubes in electro-mechanical manner. The circuit wires are connected to the terminals therefor by spring structures to maintain tension in the wires. The springs may form portions of the respective circuit wires.