Design: LED light source RIDI-TUBE, color rendering Ra >= 80, color tolerance < 3 Step Mac Adam (initial). LED modules designed as linear circuit boards. Mid-power LEDs for uniform illumination and maximum efficiency. Base profile made of extruded aluminum for optimal thermal management. Linear circuit board continuously interlocked with base profile over the entire length. Cover made of satin PMMA for efficient light extraction, socket made of robust white PC. Operation with an external LED driver (built into the light), constant current, protective extra-low voltage less than 60 volts (SELV-compliant). Factory assembly of the electrical components in almost all lights from the RIDI range. Tool-free on-site assembly of the RIDI-TUBE similar to fluorescent lamps.