All high mast mechanical and electrical materials required for a complete high mast lighting assembly that are not specified elsewhere are specified by DMS-11021. This includes rings, ring supports, obstruction lights, hoisting assemblies, power drive assemblies, electrical equipment, power cord, enclosures, and other materials detailed in the HMID standards.

High mast illumination assembly kits are prequalified under Item 614 on the MPL for Roadway Illumination and Electrical Supplies.