S&B1 418 WBR T8 Surface Mounted Double Parabolic Lover Luminaire 4x18w Housing High quality cold-rolled steel sheet. Louver 99.85% high purity anodized aluminium louver cross blade with Total Reflectance of 87% (87) mirror finished (DIN 5036-2) for longitudinal Standard 2 blades for 18w. And 5 blades for 36w. with spring-lock type for ease of maintenance. Lamp Holder Heavy duty rotary-locked type (TIS.344-1987 Standard) Wire Cable THW 1.0 sq.mm. 70'C (TIS.11-1988 Standard). Optional: 105'C 18AWG UL Standard. Color T8 Surface Mounted Double Parabolic Lover Luminaire 1x18w IP Rating IP20 Installation For surface mounted or suspension rod installation. Application Recommended for commercial buildings, shops, hospitals, labortories , schools, etc.