Rapid Tec - Ø174mm, C84, IP20 Recessed downlighter with polycarbonate bezel, sprung steel mounting clips, anodised aluminium reflectors available in semi-specular or specular. Options: E3 - Emergency control gear (609 lumens output) ST3 - Emergency Selftest AT3 - Emergency Autotest S - Switch Dimming D - Digital Dimming (DSI) A - Digital Addressable Lighting Interface (DALI) C - Bi-Level Dimming (Corridor Function) H - High Frequency Dimming (Analogue 1-10v) C83 - CRI 80, 3000K