# Commission Delegated Regulation (EU) 2019/2015 of 11 March 2019 supplementing Regulation (EU) 2017/1369 of the European Parliament and of the Council with regard to energy labelling of light sources and repealing Commission Delegated Regulation (EU) No 874/2012 (Text with EEA relevance), Annex II: Energy efficiency classes and calculation method

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

The energy efficiency class of light sources shall be determined as set out in Table 1, on the basis of the total mains efficacy ηTM, which is calculated by dividing the declared useful luminous flux Φuse (expressed in lm) by the declared on-mode power consumption Pon (expressed in W) and multiplying by the applicable factor FTM of Table 2, as follows:
ηTM = (Φuse/Pon) × FTM (lm/W).
Table 1
Energy efficiency classes of light sources
Energy efficiency class
Total mains efficacy ηΤM (lm/W)
A
210 ≤ ηΤM
B
185 ≤ ηΤM < 210
C
160 ≤ ηΤM < 185
D
135 ≤ ηΤM < 160
E
110 ≤ ηΤM < 135
F
85 ≤ ηΤM < 110
G
ηΤM < 85
Table 2
Factors FTM by light source type
Light source type
Factor FTM
Non-directional (NDLS) operating on mains (MLS)
1,0
Non-directional (NDLS) not operating on mains (NMLS)
0,926
Directional (DLS) operating on mains (MLS)
1,176
Directional (DLS) not operating on mains (NMLS)
1,089

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Source: https://www.legislation.gov.uk/eur/2019/2015/annex/II (the official version)
Page: https://openlegislation.uk/eu-regulation-2019-2015/annex-II
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.