Annex: Methodology to determine the CO2 savings of Efficient Exterior LED Lights for use in certain light commercial vehicles - Commission Implementing Decision (EU) 2020/1339 of 23 September 2020 on the approval pursuant to Regulation (EU) 2019/631 of the European Parliament and of the Council of efficient vehicle exterior lighting using light emitting diodes as an innovative technology for reducing CO2 emissions from certain light commercial vehicles in relation to the Worldwide Harmonised Light Vehicle Test Procedure (Text with EEA relevance)