The Lighting and Power Unit Type LPU57 is a series of stainless steel metal enclosures fitted with power input connectors and output connectors. The LPU57 is designed to house suitably certified equipment such as the Austdac AC36W and other permissible modules. The LPU57 is available as a 1, 2 or 4 module unit. These are identified as LPU57-1, LPU57-2 and LPU57-4.