Square recessed trimless downlight (Easy Installation) made of die-cast aluminium; System Power 21W; measurements 120x120(Aaperture)x159mm; ceiling cutout of 122mm x 122mm with a trimless mounting; ceiling thickness 1-30mm; CCT 2700K; 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 50° 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