The Fail-Safe FMR combines maximum security construction features with energy saving technology. This recessed luminaire utilizes a one-piece overlapping door frame, security lensing and tamper-resistant fasteners to maximize impact-resistance and prevent contraband concealment and unauthorized fixture penetration. An emergency battery pack is available as an option. It is UL/CUL listed for wet locations. Suitable for use in inmate cells, psychiatric wards, secure corridors and general population areas.