Cylindrical ceiling surface mounted luminaire made of aluminium; slim design; ring shaped arranged reflectors; surface powder coated; mounting plate with pre-assembled converter unit can be pre-mounted; luminaire housing can be attached without tools by interlock; incl. blind cover made of plastic in the cut-out; optional: SASSO 60 round sensor installed in the cut-out; sensor with DALI-2 control: brightness and presence sensor; high gloss reflector with faceted design; energy-efficient LEDs with very good colour rendering