{
  "url": "https://openlegislation.uk/ecodesign-for-energy-related-products-and-energy-information-lighting-products-regulations-2021/schedule-3/paragraph-1",
  "json_url": "https://openlegislation.uk/ecodesign-for-energy-related-products-and-energy-information-lighting-products-regulations-2021/schedule-3/paragraph-1.json",
  "legislation": "uksi/2021/1095",
  "legislation_title": "The Ecodesign for Energy-Related Products and Energy Information (Lighting Products) Regulations 2021",
  "legislation_url": "https://openlegislation.uk/ecodesign-for-energy-related-products-and-energy-information-lighting-products-regulations-2021",
  "path": "schedule/3/paragraph/1",
  "kind": "paragraph",
  "number": "1",
  "heading": "Energy efficiency requirements",
  "text": "Light sources\n(1) The declared power consumption of a light source Pon must not exceed the maximum allowed power Ponmax (in W), defined as a function of the declared useful luminous flux Φuse (in lm) and the declared colour rendering index CRI (-) as follows—\nPonmax = C × (L + Φuse/(F × η)) × R;\nwhere—\n(a) the values for threshold efficacy (η in lm/W) and end loss factor (L in W) are as specified in Table 2, according to the light source type;\n(b) basic values for correction factor (C) depending on light source type, and additions to C for special light source features are specified in Table 3;\n(c) efficacy factor (F) is—\n(i) 1.00 for non-directional light sources (NDLS, using total flux);\n(ii) 0.85 for directional light sources (DLS, using flux in a cone);\n(d) CRI factor (R) is—\n(i) 0.65 for CRI ≤ 25;\n(ii) (CRI+80)/160 for CRI > 25,\nrounded to two decimals.\nTable 2\nThreshold efficacy (η) and end loss factor (L)\nLight source description\nη\nL\n(lm/W)\n(W)\nLFL T5-HE\n98.8\n1.9\nLFL T5-HO, 4,000 ≤ Φ ≤ 5,000 lm\n83.0\n1.9\nLFL T5-HO, other lm output\n79.0\n1.9\nFL T5 circular\n79.0\n1.9\nFL T8 (including FL T8 U-shaped)\n89.7\n4.5\nFrom 1st September 2023, for FL T8 of 2-, 4- and 5-foot\n120.0\n1.5\nMagnetic induction light source, any length or flux\n70.2\n2.3\nCFLni\n70.2\n2.3\nFL T9 circular\n71.5\n6.2\nHPS single-ended\n88.0\n50.0\nHPS double-ended\n78.0\n47.7\nMH ≤ 405 W single-ended\n84.5\n7.7\nMH > 405 W single-ended\n79.3\n12.3\nMH ceramic double-ended\n84.5\n7.7\nMH quartz double-ended\n79.3\n12.3\nOLED\n65.0\n1.5\nBefore 1 September 2023: HL G9, G4 and GY6.35\n19.5\n7.7\nHL R7s ≤ 2 700 lm\n26.0\n13.0\nConnected light sources (CLS) not mentioned above\n120.0\n2.0\nOther light sources not mentioned above\n120.0\n1.5\nTable 3\nCorrection factor C depending on light source characteristics\nLight source type\nBasic C value\nNon-directional (NDLS) not operating on mains (NMLS)\n1.00\nNon-directional (NDLS) operating on mains (MLS)\n1.08\nDirectional (DLS) not operating on mains (NMLS)\n1.15\nDirectional (DLS) operating on mains (MLS)\n1.23\nSpecial light source feature\nAddition on C\nFL or HID with CCT > 5,000K\n+0.10\nFL with CRI > 90\n+0.10\nHID with second envelope\n+0.10\nMH NDLS > 405 W with non-clear envelope\n+0.10\nDLS with anti-glare shield\n+0.20\nColour-tuneable light source (CTLS)\n+0.10\nHigh luminance light source (HLLS)\n+ 0.0058 · Luminance-HLLS – 0.0167\n(2) For the purposes of this paragraph—\n(a) where applicable, additions on correction factor C are cumulative;\n(b) the addition for HLLS must not be combined with the basic C-value for DLS (basic C-value for NDLS must be used for HLLS);\n(c) light sources which allow the end-user to adapt the spectrum and/or the beam angle of the emitted light, resulting in changes to the values for useful luminous flux, colour rendering index (CRI) and/or correlated colour temperature (CCT), and/or changing the directional/non-directional status of the light source, must be evaluated using the reference control settings;\n(d) the standby power Psb of a light source must not exceed 0.5 W;\n(e) the networked standby power Pnet of a connected light source must not exceed 0.5 W;\n(f) the allowable values for Psb and Pnet must not be added together.\n(3) This paragraph is subject to the exemptions in paragraph 3(3) of Schedule 4.",
  "extent": "E+W+S",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "I",
      "label": "I1",
      "text": "Sch. 3 para. 1 in force at 1.10.2021, see reg. 1(2)"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/2021/1095/schedule/3/paragraph/1",
    "retrieved_at": "2026-11-06T03:38:19.287786+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}