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The objective of this scheme is to provide an assurance of the validity of the power data measured by manufacturers when describing the performance of their lighting products for use in unmetered supply (UMS) applications.

A manufacturer participating in this scheme will be required to undergo a thorough inspection of their Laboratory in order to verify the adequacy of the measurement equipment, documentation and the technical competence of the staff.  A manufacturer who meets the requirements will be permitted to make measurements of apparent power and true power for their products at their facility and submit these measurements to the LIA Laboratories in lieu of report preparation for submission to ELEXON.  LIA Laboratories will ensure, by regular inspection, that the integrity of the measurements made by a ‘Registered Laboratory’ is maintained at an appropriately high standard.

TSD-005 Scheme documents
TSD-005 UMSUG measurements scheme document

The LIA Laboratories' technical scheme document details the requirements lighting manufacturers must fulfil in order to work towards certification.

Application form

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