Rubix Surface - 600x600 Surface mounted luminaire, white powder coated steel body, individual cells with opal surround trim for precise optical control. Individually switched diffused back lit halo. Options: E3 - Emergency control gear (498 lumens output) ST3 - Emergency control gear self test AT3 - Emergency control gear DALI auto test S - Switch Dimming (2x drivers) D - Digital Dimming (DSI) (2x drivers) A - Digital Addressable Lighting Interface (DALI)(2x drivers) H - High Frequency Dimming (Analogue 1-10v)(2x drivers) R44 - Daylight regulating and Occupancy Sensor RAS - Reacta Air Wireless occupancy and daylight dimming RLS - Reacta-Link Wireless Presence & Daylight Sensor RCS - Reacta-Control Wireless, Presence BL - Blue Cell Surround OR - Orange Cell Surround R - Red Cell Surround BK - Black Cell Surround