For recessed installation in solid ceilings where IP44-rating is required (DP and OP variants). According to maritime requirements. Robust steel housing and steel frame fits to housing with screws. Powder coated white RAL9016. Double prismatic (DP) or Opalic (OP) plastic sheet in steel frame (IP44) or White grid (WG) plastic in frame (IP20). Suspension brackets (MNT-S) are included for TL11-R222; for TL11-R250 they have to be ordered as accessories.   TL11-R250 LED is designed for solid ceilings. It can be used for retrofit since it fits to old cut outs for old aquas signal 1226 and old Glamox GIM with T8/T12. TL11-R222 LED is specially designed for shadow panels as Danacoustic or Dampa M3. Emergency box EB3 has to be ordered as accessory for TL11-R EB3 LED versions. Emergency is integrated at TL11-R E3 fluorescent.