The consultation document on the proposed changes to Part L – the energy-efficiency part of the regulations has been published by the Department of Communities and Local Government and includes the Lighting Energy Numeric Indicator (LENI) methodology.

LENI will be an alternative to the the current method of calculating lighting efficienc, which is based on specifying minimum levels of performance (in lumens per circuit watt) for light fittings. It proposes to increase the minimum initial luminaire efficacy from 55 to 60 luminaire lumens per circuit-watt in the 2013 version of the Building Regulations

LENI – the lighting energy numeric indicator – is based on a complex calculation of factors and will be an alternative to current luminaire-efficacy approach. It takes a more holistic approach and is expressed in kWh/m2 per year, making it easier to set a minimum and compare buildings.

The consultation paper is available here to download where you can also find instructions on how to comment on the proposals.

To view the section relevant to lighting, click here for Section two: Proposed Changes to technical guidance and go to page 125.

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