Cylindrical lighting system in aluminium; surface powder coated; wall-/ceiling surface mounting or suspended mounting; height adjustment without tools; incl. feeder cable; electrical connection of the luminaires via plug/socket system; optionally connectors (flex or L- / T- / X-shape) and BLIND CHANNEL; luminaire connection rotatable around its own axis, which means that any spatial angle can be realized; high gloss reflector with faceted design; direct, indirect or direct / indirect light distribution; indirect light component with integrated PC boards and high quality lens system for homog. ceiling illumination, separately controllable; energy-efficient LEDs with very good colour rendering