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Last edited 16 Dec 2020
Light output ratio
The light output ratio (LOR) of a luminaire is: ‘…the ratio of the total light output of the luminaire under stated practical conditions to that of the lamp or lamps contained in the luminaire under reference conditions.'
Ref Non-domestic Building Services Compliance Guide For Scotland, 2015 Edition v1.1, published by the Scottish Government, Building Standards Division in April 2018.
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