Quadratum S12: Quadratum S12 luminaire is a recessed sealed light suitable for subsurface rail applications. Designed in accordance with fire precautions for subsurface rail stations (Section 12). Complies with London Underground subsurface standard S1085 utilising low smoke, zero halogen cables and control gear. IP65 and rated to IK08 (5 joules of energy). Zinc coated steel body with frosted glass diffuser held against steel frame by silicone gasket seal. Integral electronic control gear with fused terminal block. Designed to suit concealed fix ‘Z’ systems (requires independent suspension). Efficacy of 102 lm/W. Suitable for recessed ceiling mounting and finished in white polyester powder coat. Colour Temperature:4000K CRI:>80 LED Lifetime L80B10>72,000h at 25oC ambient. Driver Lifetime up to 100,000h at 25oC ambient.