T&F1 318 SCR Recess Air Supply Louver Luminaire 3x18w Housing High quality cold-rolled steel sheet Reflector 99.85% high purity anodized aluminium reflector mirror finished (DIN 5036-2) for normal usage. Lamp Holder Heavy duty rotary-locked type lamp holder (TIS.344-1987 Standard) Wire Cable THW 1.0 sq.mm. 70'C (TIS.11-1988 Standard). Optional: 105'C 18AWG UL Standard. IP Rating IP20 Installation For recessed T-bar ceiling installation. Application Recommended for commercial buildings, hospitals, laboratories , schools, etc.