# The Ecodesign for Energy-Related Products and Energy Information (Lighting Products) Regulations 2021, Paragraph 3: Functional requirements


The functional requirements specified in Table 5 apply to light sources.
Table 5
Functional requirements for light sources
Colour rendering
CRI ≥ 80 (except for HID with Φuse > 4 klm and for light sources intended for use in outdoor applications, industrial applications or other applications where lighting standards allow a CRI< 80, when a clear indication to this effect is shown on the light source packaging and in all relevant printed and electronic documentation)
Displacement factor (DF, cos φ1) at power input Pon for LED and OLED MLS
No limit at Pon ≤ 5 W;
DF ≥ 0.5 at 5 W < Pon ≤ 10 W;
DF ≥ 0.7 at 10 W < Pon ≤ 25 W;
DF ≥ 0.9 at 25 W < Pon
Lumen maintenance factor (for LED and OLED)
The lumen maintenance factor XLMF% after endurance testing in accordance with Schedule 5 must be at least XLMF,MIN% calculated as follows—
X LMF,MIN %=100×e ( 3000×ln⁡( 0.7 ) ) L 70 where L70 is the declared L70B50 lifetime (in hours).
If the calculated value for XLMF,MIN exceeds 96.0%, an XLMF,MIN value of 96.0% applies.
Survival factor (for LED and OLED)
Light sources must be operational as specified in row “Survival factor (for LED and OLED)” Schedule 2, Table 1, following the endurance testing given in Schedule 5.
Colour consistency for LED and OLED light sources
Variation of chromaticity coordinates within a six-step MacAdam ellipse or less.
Flicker for LED and OLED MLS
Pst LM ≤ 1,0 at full-load
Stroboscopic effect for LED and OLED MLS
Before 31st August 2024:
SVM ≤ 0.9 at full-load (except for light sources intended for use in outdoor applications, industrial applications or other applications where lighting standards allow a CRI< 80);
From 1st September 2024:
SVM ≤ 0.4 at full-load (except for light sources intended for use in outdoor applications, industrial applications or other applications where lighting standards allow a CRI< 80)

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Source: https://www.legislation.gov.uk/ukdsi/2021/9780348225488/schedule/3/paragraph/3 (the official version)
Page: https://openlegislation.uk/draft-ecodesign-for-energy-related-products-and-energy-information-lighting-products-regulations-2021/schedule-3/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.