Quadrant S12: Quadrant S12 is a specialised bulkhead fitting designed 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. IP54 and rated to IK08 (5 joules of energy). Zinc coated steel body finished in black polyester powder coat with lead crystal opal glass diffuser held against gasket by tamperproof screws. Electronic control gear on removal tray for ease of upgrade/repair with fused plug and socket connector block. Efficacies of >89 lm/W. Suitable for surface ceiling or wall mounting, or optional semi-recessed ceiling mounting. Colour Temperature:4000K CRI:>80 LED Lifetime L70B10>110,000h at 25oC ambient. Driver Lifetime up to 100,000h at 25oC ambient.