MOD Secure Surface - 1500x200, IP40, IK10 Surface mounted luminaire, white powder coated steel body, designed to be compliant with the requirements of the Department of Health Environmental Guide, Adult Medium Secure Services when installed with anti-pick mastic. Options: E3 - Emergency control gear (576 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)