# 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), Division 3: CALCULATION OF THE CO2 SAVINGS

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

The CO2 savings shall be calculated in accordance with Formula 4.
where:
v is the mean driving speed of the WLTP, which is 46,6 km/h
ηA is the efficiency of the alternator, which is 0,67
UFi is the usage factor of the vehicle light i as defined in Table 4
VPe is the consumption of effective power for each fuel approved, as defined in Table 5
CF is the fuel conversion factor as defined in Table 6.
Table 4
Usage factor for different vehicle lights
Vehicle light
Usage factor (UF)
Low beam headlamp
0,33
High beam headlamp
0,03
Front position
0,36
Licence plate
0,36
Front fog lamp
0,01
Rear fog lamp
0,01
Front turn signal lamp
0,15
Rear turn signal lamp
0,15
Reversing lamp
0,01
Cornering lamp
0,019
Static Bending lamp
0,039
End-outline marker lamps (width > 2,1 m)
0,36
Side marker lamps (length > 6 m)
0,36
Rear position lamp
0,36
Table 5
Consumption of effective power
Type of Engine
Consumption of effective power VPe [l/kWh]
Petrol/E85
0,264
Petrol/E85 Turbo
0,280
Diesel
0,220
LPG
0,342
LPG Turbo
0,363
Consumption of effective power VPe [m3/kWh]
CNG (G20)
0,259
CNG (G20) Turbo
0,275
Table 6
Fuel Conversion Factor
Type of fuel
Conversion factor (CF) [g CO2/l]
Petrol/E85
2 330
Diesel
2 640
LPG
1 629
Conversion factor (CF) [g CO2/m3]
CNG (G20)
1 795

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Source: https://www.legislation.gov.uk/eudn/2020/1339/annex/division/3 (the official version)
Page: https://openlegislation.uk/eu-decision-2020-1339/annex/division-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.