An LED luminaire with an integrated battery backup is divided into a hidden infrastructure portion and a decorative body portion. The luminaire body has a main lighting deck with at least one LED mounted thereon and a decorative skirt extending from the main lighting deck. A diffuser panel is received over the main lighting deck. The hidden infrastructure portion includes a light fixture housing configured and arranged to be mounted within a building infrastructure, an emergency battery backup assembly received within the light fixture housing wall, and a housing fixture bracket secured within the light fixture housing to support the emergency backup assembly in the upper portion of the light fixture housing.