Round recessed trimless downlight (Easy Installation) made of die-cast aluminium; System Power 21W; measurements Φ100(Aperture)x131mm; ceiling cutout of Ø108mm with a trimless mounting; ceiling thickness 1-25mm; CCT 4000K; high color rendering at an index of CRI90; after a lifetime of 50000h L80B10 min. 80% of the luminous flux with energy efficient CITIZEN LED Chips; 5 years warranty; beam characteristic with 24° beam angle; lighting perfectly suitable for reading, writing as well as computer and control work with UGR<19; degree of housing protection IP54; light source replaceable by a qualified electrician; driver replaceable by a qualified electrician