C91-R is a modular LED luminaire for special mounting solutions. C91-R comes with a fully illuminated surfaces with excellent design, flexibility and visual performance. With its high finish and large illuminated surface C91-R comes one with the ceiling. Excellent design C91-R is a product designed with premium light qualities with limited visible luminaire frame in the ceiling. The frame around the optics is made in one piece without any joints and is only 24mm wide. This makes the frame almost invisible in the T-bar system. Perfect balance The C91-R is designed with focus on light quality. All details are carefully measured to achieve premium homogenous light. Tailor-made LED modules are carefully designed and selected to provide excellent light quality. Distance from LED module to optic is set for a perfect result. Great flexibility C91-R is well suitable for up to 48mm T-bar ceilings like Armstrong Prelude 35 and asymmetric, concealed T-bar systems with demountable ceiling tiles like AMW AW, Gyproc Gyptone D1/D2, OWA S 9b and Rockfon D-XL/H. C91-R is available with four different optics: Micro Prismatic (MP), Opal (OP), Circle (CI) and Opalic Drop out (OD). A external driver box is delivered with the luminaire. Connection and maintenance is done without opening the luminaire. Version with IK10 C91-R can be delivered with optics in polycarbonate (PC) and is approved for IK10.