# Commission Delegated Regulation (EU) No 65/2014 of 1 October 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of domestic ovens and range hoods (Text with EEA relevance), Division 2.3: Calculation of the Lighting Efficiency (LEhood)

Extent: E+W+S+N.I.

The Lighting Efficiency (LEhood) of a domestic range hood means the ratio between the average illumination and the nominal electric power input of the lighting system. It shall be calculated in lux per Watt and rounded at the nearest integer, as:
LE hood=EmiddleWLWhere:
Emiddle is the average illumination of the lighting system on the cooking surface measured under standard conditions, in lux and rounded to the nearest integer,
WL is the nominal electric power input of the lighting system of the domestic range hood on the cooking surface, in Watt and rounded to the first decimal place.

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Source: https://www.legislation.gov.uk/eur/2014/65/annex/II/division/2/division/2.3 (the official version)
Page: https://openlegislation.uk/eu-regulation-2014-65/annex-II/division-2/division-2.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.