# Commission Implementing Decision (EU) 2020/1222 of 24 August 2020 on the approval of efficient vehicle exterior lighting using light emitting diodes as an innovative technology for reducing CO2 emissions from internal combustion engine powered light commercial vehicles with regard to NEDC conditions pursuant to Regulation (EU) 2019/631 of the European Parliament and of the Council (Text with EEA relevance), Division 4.1: General methodology

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

The uncertainty of the CO2 savings () [W] shall be calculated in accordance with Formula 5.
Formula 5
where,
mis the number of exterior LED lights in the combination tested.
is the statistical margin of the power consumption of each i-th LED light fitted in the eco-innovative vehicle which shall be calculated in accordance with Formula 6.
Formula 6
In case of a low beam AFS the statistical margin of the power consumption () [W] shall instead be calculated in accordance with Formulas 7 and 8.
Formula 7
Formula 8
where,
nis the number of power consumption measurements, which is at least 5 as indicated in section 2.2.1
icorresponds to each vehicle light
jrefers to an individual measurement of power consumption
is the average of the n values of Pk
Kis the number of classes associated with the low beam AFS.

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Source: https://www.legislation.gov.uk/eudn/2020/1222/annex/division/4/division/4.1 (the official version)
Page: https://openlegislation.uk/eu-decision-2020-1222/annex/division-4/division-4.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.