Sira LED - 1800mm Suspended bi-directional luminaire, white powder coated steel body and glare regulating optic. Options: E3 - Emergency control gear (695 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) R44 - Daylight regulating and Occupancy Sensor RAS - Reacta Air Wireless occupancy and daylight dimming B - Black Body GY - Grey Body Continuous Run options: ST - Start of Run TW - Through Wire ER - End of Run SIR COR TW - Element Adjustable Through Wire Corner SIR BLIND 1260 TW - Sira LED Suspended Continuous Run, 1260mm, 6 pole through wire blind unit SIR BLIND 1500 TW - Sira LED Suspended Continuous Run, 1500mm, 6 pole through wire blind unit SIR EC - Sira LED End Cap (please specify one set per run of luminaires). SIR JOINER - Sira LED Joining Kit (required to connect End of Run to Start of Run luminaires where new power feeds are required mid run) P414 - 3M Suspension Kit