{"id":24235,"date":"2025-06-25T13:47:40","date_gmt":"2025-06-25T11:47:40","guid":{"rendered":"https:\/\/www.vsl.nl\/?page_id=24235"},"modified":"2025-07-25T16:28:52","modified_gmt":"2025-07-25T14:28:52","slug":"mettlm","status":"publish","type":"page","link":"https:\/\/www.vsl.nl\/en\/mettlm\/","title":{"rendered":"MetTLM"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_section full_width=&#8221;stretch_row&#8221; content_placement=&#8221;middle&#8221; css=&#8221;.vc_custom_1750925443329{background-image: url(https:\/\/www.vsl.nl\/wp-content\/uploads\/2025\/06\/DTU_sphere_2m_b.jpg?id=24406) !important;background-position: center !important;background-repeat: no-repeat !important;background-size: cover !important;}&#8221; el_class=&#8221;main_header gradient_header dg-position-realtive&#8221;][vc_row equal_height=&#8221;yes&#8221; content_placement=&#8221;middle&#8221; el_class=&#8221;dg-header&#8211;small&#8221;][vc_column width=&#8221;2\/3&#8243; el_class=&#8221;dg-padding-none full_width_responsive&#8221;][vc_column_text css=&#8221;.vc_custom_1750852036420{margin-bottom: 0px !important;padding-bottom: 0px !important;}&#8221; el_class=&#8221;text-white&#8221;]<\/p>\n<h1>Metrology for Temporal Light Modulation<\/h1>\n<p>A Joint Research Project within the European Metrology Programme for Innovation and Research[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/3&#8243;][\/vc_column][\/vc_row][\/vc_section][vc_section css=&#8221;.vc_custom_1726660259741{padding-top: 0px !important;}&#8221;][vc_row css=&#8221;.vc_custom_1726660264253{padding-top: 0px !important;}&#8221;][vc_column width=&#8221;5\/6&#8243;][\/vc_column][vc_column width=&#8221;1\/6&#8243;][vc_single_image image=&#8221;24416&#8243; img_size=&#8221;full&#8221; alignment=&#8221;right&#8221; css=&#8221;.vc_custom_1750926369611{margin-bottom: 0px !important;}&#8221; image_hovers=&#8221;false&#8221;][\/vc_column][\/vc_row][\/vc_section][vc_section el_class=&#8221;dg-padding-mid-bottom dg-padding-small-top&#8221;][vc_row][vc_column width=&#8221;5\/6&#8243; el_class=&#8221;full_width_responsive dg-padding-none&#8221;][vc_column_text css=&#8221;.vc_custom_1753453730753{margin-bottom: 0px !important;}&#8221;]<\/p>\n<h2>Welcome<\/h2>\n<p>LED-based lighting contributes to energy saving and the reduction of the environmental impact of lighting. However, LED lamps can show fluctuations in the light output known as temporal light modulation (TLM) which could, above certain limits and under certain conditions, impact the health, well-being and safety of people. The new EU Ecodesign 2019\/2020 \u2018Single Lighting Regulation\u2019 sets limitations on TLM.<\/p>\n<p>The overall aim of this project is to create the metrology infrastructure for the measurement of TLM in LED lighting and the visual effects induced by TLM, known as temporal light artefacts (TLAs). This project will develop and validate measurement methods for quantitative measurement of TLAs, such as flicker and the stroboscopic effect, and it will advance the development of a metric for the phantom array effect.<\/p>\n<p>The project results will underpin the development of standardisation on TLM and will provide the lighting industry, instrument manufacturers and market surveillance authorities with undisputable results of their TLM measurements.<\/p>\n<p>The MetTLM project has been finalised in August 2024.[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/6&#8243; css=&#8221;.vc_custom_1726654096238{margin-top: 0px !important;margin-right: 0px !important;margin-bottom: 0px !important;margin-left: 0px !important;padding-top: 0px !important;padding-right: 0px !important;padding-left: 0px !important;}&#8221;][\/vc_column][\/vc_row][\/vc_section][vc_row][vc_column el_class=&#8221;dg-padding&#8211;none-inner&#8221;][vc_column_text css=&#8221;&#8221;]<\/p>\n<h2>Updates<\/h2>\n<p>[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">11 October 2024<\/ins><\/p>\n<p><a href=\"https:\/\/www.vsl.nl\/en\/mettlm\/results\/\">Publishable summary for the MetTLM project status August 2024<\/a>\u00a0available on the website..[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">15 August 2024<\/ins><\/p>\n<p>Descriptions of the\u00a0<a href=\"https:\/\/www.vsl.nl\/en\/mettlm\/project\/\">project<\/a>\u00a0and the\u00a0<a href=\"https:\/\/www.vsl.nl\/en\/mettlm\/results\/\">results<\/a>\u00a0on this website have been updated.[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">15 April 2024<\/ins><\/p>\n<p class=\"tablep\"><a href=\"https:\/\/www.youtube.com\/watch?v=3ozMUfppUk0\" target=\"_blank\" rel=\"noopener\">Researcher interview Jennifer Veitch on Temporal Light Modulation, MetTLM 20NRM01, available on Youtube<\/a><\/p>\n<p class=\"tablep\"><iframe title=\"Researcher interview Jennifer Veitch on Temporal Light Modulation, MetTLM 20NRM01\" data-src=\"https:\/\/www.youtube.com\/embed\/3ozMUfppUk0\" width=\"356\" height=\"260\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" data-mce-fragment=\"1\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" data-load-mode=\"1\"><\/iframe><\/p>\n<p>[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">15 March 2024<\/ins><\/p>\n<p class=\"tablep\"><strong>Register for the Training session on the measurement of temporal light modulation (TLM)<\/strong><\/p>\n<p class=\"tablep\">Date: 18 April 2024<\/p>\n<p class=\"tablep\">Location: Physikalisch-Techische Bundesanstalt (PTB) Braunschweig, Bundessallee 100, 38116 Braunschweig, Germany<br \/>\n<a href=\"https:\/\/www.mettlm.eu\/training.html\">To register, please see details on this page<\/a>.<\/p>\n<p>[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">6 March 2024<\/ins><\/p>\n<p class=\"tablep\"><strong>Register now for the\u00a0<\/strong><strong>Online webinar on measurement of lighting with temporal light modulation and ecodesign<\/strong><\/p>\n<p class=\"tablep\">Date: 12 April 2024<\/p>\n<p class=\"tablep\">Time: 10:00 &#8211; 11:30 h<br \/>\nTo receive a link to attend, please register on the website of LightingEurope:\u00a0<a href=\"https:\/\/www.lightingeurope.org\/events\/715-measurement-of-lighting-with-temporal-light-modulation-and-ecodesign\">&#8216;Measurement of lighting with temporal light modulation and EcoDesign&#8217; &#8211; LightingEurope<\/a><\/p>\n<p>[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">1 February 2024<\/ins><\/p>\n<p class=\"tablep\"><strong>Save the date: 12 April 2024\u00a0\u00a0<\/strong><em>(time to be announced)<\/em><\/p>\n<p class=\"tablep\"><strong>Online webinar on measurement of lighting with temporal light modulation and ecodesign<\/strong><\/p>\n<p class=\"tablep\">LightingEurope and the MetTLM consortium invite you to our upcoming joint webinar, where we will delve into the measurement and characterisation of Temporal Light Modulation, related perception artefacts and its relation to the upcoming revision of ecodesign lighting regulations.<br \/>\nThis event is tailored to professionals involved in lighting industry, lighting regulation and market surveillance, and others who are committed to ensuring the quality of lighting technologies and ensuring the health and comfort of lighting users.\u00a0<a href=\"https:\/\/www.mettlm.eu\/mailinglist\/\">Subscribe to our mailinglist for updates on how to attend.<\/a><\/p>\n<p>[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">11 September 2023<\/ins><\/p>\n<p class=\"tablep\"><a href=\"https:\/\/www.youtube.com\/watch?v=Zcc8rCKnOeU\" target=\"_blank\" rel=\"noopener\">Informative video explaining temporal light modulation for the MetTLM project, available on Youtube<\/a><\/p>\n<p class=\"tablep\"><iframe class=\"videoclip lazyload\" title=\"YouTube video player\" data-src=\"https:\/\/www.youtube.com\/embed\/Zcc8rCKnOeU?si=43nKLhGTo3IPfFKz\" width=\"356\" height=\"200\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" data-mce-fragment=\"1\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" data-load-mode=\"1\"><\/iframe><\/p>\n<p>[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">18-20 September 2023<\/ins><\/p>\n<p class=\"tablep\"><a href=\"https:\/\/www.vsl.nl\/en\/mettlm\/events#cie\">CIE 30th Quadrennial Session, Ljubljana, Slovenia<\/a><\/p>\n<p>[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">23-25 June 2023<\/ins><\/p>\n<p class=\"tablep\"><a href=\"https:\/\/www.vsl.nl\/en\/mettlm\/events#cie\">CIE 30th Quadrennial Session, Ljubljana, Slovenia<\/a><\/p>\n<p>[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">13-14 June 2023<\/ins><\/p>\n<p>27-month meeting of the project consortium.[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">24 February 2023<\/ins><\/p>\n<div class=\"row border-top\">\n<div class=\"padding05remnested\">\n<p class=\"tablep\"><a href=\"https:\/\/www.vsl.nl\/en\/mettlm\/results\/\">Publishable summary and project results<\/a> updated on the website.<\/p>\n<\/div>\n<\/div>\n<p>[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">9-10 November 2022<\/ins><\/p>\n<div class=\"row border-top\">\n<div class=\"padding05remnested\">\n<p>18-month meeting of the project consortium.<\/p>\n<\/div>\n<\/div>\n<p>[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">15 October 2022<\/ins><\/p>\n<div class=\"row border-top\">\n<div class=\"padding05remnested\">\n<p>Update of Events and Publications.<\/p>\n<\/div>\n<\/div>\n<p>[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">20 April 2022<\/ins><\/p>\n<div class=\"row border-top\">\n<div class=\"padding05remnested\">\n<p><a href=\"https:\/\/www.vsl.nl\/en\/mettlm\/results\/\">Publishable summary and project results<\/a> updated on the website.<\/p>\n<\/div>\n<\/div>\n<p>[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">1-2 February 2022<\/ins><\/p>\n<div class=\"row border-top\">\n<div class=\"padding05remnested\">\n<p>9-month meeting of the project consortium.<\/p>\n<\/div>\n<\/div>\n<p>[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">28 September 2021<\/ins><\/p>\n<div class=\"row border-top\">\n<div class=\"padding05remnested\">\n<p><a href=\"https:\/\/www.vsl.nl\/en\/mettlm\/events#cie-2021\">CIE 2021 Midterm Meeting &amp; Conference<\/a> has a session devoted to temporal light modulation, with two presentations from the project.<\/p>\n<\/div>\n<\/div>\n<p>[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">25 June 2021<\/ins><\/p>\n<div class=\"row border-top\">\n<div class=\"padding05remnested\">\n<p>Website for MetTLM goes online.<\/p>\n<\/div>\n<\/div>\n<p>[\/vc_column_text][vc_column_text css=&#8221;&#8221; el_class=&#8221;dg-update&#8211;row&#8221;]<ins datetime=\"2025-06-26T08:26:39+00:00\">17 May 2021<\/ins><\/p>\n<div class=\"row border-top\">\n<div class=\"padding05remnested\">\n<p>Kick-off meeting for the Joint Research Project.<\/p>\n<\/div>\n<\/div>\n<p>[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_section full_width=&#8221;stretch_row&#8221; 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