{"id":5621,"date":"2023-07-05T16:57:54","date_gmt":"2023-07-05T14:57:54","guid":{"rendered":"https:\/\/www.vsl.nl\/?p=5621"},"modified":"2026-03-23T16:51:18","modified_gmt":"2026-03-23T14:51:18","slug":"metrology-for-temporal-light-modulation","status":"publish","type":"post","link":"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/","title":{"rendered":"Metrology for temporal light modulation"},"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_1684326449990{background-image: url(https:\/\/www.vsl.nl\/wp-content\/uploads\/2023\/05\/VSL_labs-232-scaled.jpg?id=5628) !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;5\/6&#8243; el_class=&#8221;dg-padding-none&#8221;][vc_column_text css=&#8221;.vc_custom_1684326474307{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>[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/6&#8243;][\/vc_column][\/vc_row][\/vc_section][vc_section el_class=&#8221;dg-padding-mid&#8221;][vc_row equal_height=&#8221;yes&#8221; content_placement=&#8221;top&#8221;][vc_column width=&#8221;2\/3&#8243; el_class=&#8221;full_width_responsive dg-padding-none&#8221;][vc_column_text css=&#8221;.vc_custom_1684326483364{padding-right: 10% !important;}&#8221; el_class=&#8221;full_width_responsive dg-padding-none&#8221;]<\/p>\n<p class=\"header_subtext\">Projects<\/p>\n<h2>Metrology for temporal light modulation<\/h2>\n<p>LED-based lighting contributes to energy saving and the reduction of the environmental impact of lighting. 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. 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. 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.[\/vc_column_text][vc_column_text el_class=&#8221;full_width_responsive dg-padding-none&#8221;]<\/p>\n<h2>Our role<\/h2>\n<p>VSL is coordinating this project and leading the work package on methods for traceable and validated measurement of temporal light modulation. In this work package, VSL is working on methods to calibration and characterisation of TLM measurement devices and the evaluation of uncertainty budgets. To validate the newly established traceability, an interlaboratory comparison will be held.[\/vc_column_text][vc_column_text el_class=&#8221;full_width_responsive dg-padding-none&#8221;]<strong>Start date:<\/strong> May 1, 2021<br \/>\n<strong>End date:<\/strong> May 31, 2024[\/vc_column_text][vc_column_text el_class=&#8221;full_width_responsive dg-padding-none&#8221;]Read more about this project <a href=\"https:\/\/www.mettlm.eu\/\">here<\/a>.[\/vc_column_text][vc_column_text el_class=&#8221;full_width_responsive dg-padding-none&#8221;]<em>&#8220;The project has received funding from the European Partnership on Metrology, co-financed by European Union Horizon Europe Research and Innovation Programme and from the Participating States.\u201d<\/em>[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/3&#8243; css=&#8221;.vc_custom_1757516516827{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; el_class=&#8221;tablet_expert full_width_responsive&#8221;]<div class=\"templatera_shortcode\"><section class=\"vc_section\"><div class=\"vc_row wpb_row vc_row-fluid full_width_responsive\"><div class=\"dg-specialist--inner dg-padding--none-inner wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner vc_custom_1757057705883\"><div class=\"wpb_wrapper\">\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_left  vc_custom_1757060529990  dg-expert--image\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img decoding=\"async\" width=\"500\" height=\"333\" data-src=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2025\/09\/Paul-Dekker.jpg\" class=\"vc_single_image-img attachment-full lazyload\" alt=\"\" title=\"Paul-Dekker\" data-srcset=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2025\/09\/Paul-Dekker.jpg 500w, https:\/\/www.vsl.nl\/wp-content\/uploads\/2025\/09\/Paul-Dekker-300x200.jpg 300w\" data-sizes=\"(max-width: 500px) 100vw, 500px\"  data-dt-location=\"https:\/\/www.vsl.nl\/en\/?attachment_id=26952\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 500px; --smush-placeholder-aspect-ratio: 500\/333;\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n<div class=\"vc_row wpb_row vc_inner vc_row-fluid dg-padding--square vc_custom_1757057909078 vc_row-o-equal-height vc_row-o-content-middle vc_row-flex\"><div class=\"dg-padding--none-inner dg-expert--inner-content wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner vc_custom_1757058090823\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element  vc_custom_1757510893821 dg-expert--content-header\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h3>Would you like to know more about our services?<\/h3>\n<p>Our experts are happy to help.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element  vc_custom_1757060549163 sector_specialist\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p><b>Paul Dekker<\/b><br \/>\nSenior Metrologist Length - Optics<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div class=\"wpb_raw_code wpb_raw_html wpb_content_element vc_custom_1757060563914\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<i class=\"far fa-envelope green_icon\"><\/i> <a class=\"custom_link_specialist\" href=\"mailto:pdekker@vsl.nl\"> pdekker@vsl.nl<\/a>\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/section><\/div>[\/vc_column][\/vc_row][\/vc_section][vc_section full_width=&#8221;stretch_row&#8221; el_class=&#8221;dg-padding-mid&#8221; css=&#8221;.vc_custom_1669644694568{background-color: #fafafa !important;}&#8221;][vc_row css=&#8221;.vc_custom_1641224545247{margin-bottom: 0px !important;padding-bottom: 0px !important;}&#8221;][vc_column width=&#8221;2\/3&#8243; el_class=&#8221;dg-padding-none&#8221;][vc_column_text css=&#8221;.vc_custom_1672324944721{margin-bottom: 0px !important;padding-bottom: 0px !important;}&#8221;]<\/p>\n<p class=\"header_subtext\">Projects<\/p>\n<h3>Our expertise in practice<\/h3>\n<p>Read more about our projects.[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/3&#8243;][\/vc_column][\/vc_row][vc_row el_class=&#8221;dg-padding-small-top&#8221;][vc_column el_class=&#8221;dg-padding-none&#8221;][vc_basic_grid post_type=&#8221;post&#8221; max_items=&#8221;10&#8243; element_width=&#8221;3&#8243; item=&#8221;256&#8243; grid_id=&#8221;vc_gid:1774277456926-01c054ef-408f-3&#8243; taxonomies=&#8221;9&#8243;][\/vc_column][\/vc_row][\/vc_section]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<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) <\/p>\n","protected":false},"author":3,"featured_media":5629,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[79,51],"tags":[],"class_list":["post-5621","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health-and-environment","category-projects","category-79","category-51","description-off"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Metrology for temporal light modulation - VSL<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Metrology for temporal light modulation - VSL\" \/>\n<meta property=\"og:description\" content=\"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)\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/\" \/>\n<meta property=\"og:site_name\" content=\"VSL\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-05T14:57:54+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-23T14:51:18+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2023\/05\/VSL_labs-232-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"1707\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"VSL_admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"VSL_admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/\"},\"author\":{\"name\":\"VSL_admin\",\"@id\":\"https:\/\/www.vsl.nl\/#\/schema\/person\/afec8fd6398b050db8b6014a5370fa23\"},\"headline\":\"Metrology for temporal light modulation\",\"datePublished\":\"2023-07-05T14:57:54+00:00\",\"dateModified\":\"2026-03-23T14:51:18+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/\"},\"wordCount\":592,\"image\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2023\/05\/VSL_labs-232-scaled.jpg\",\"articleSection\":[\"Health and Environment\",\"Projects\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/\",\"url\":\"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/\",\"name\":\"Metrology for temporal light modulation - VSL\",\"isPartOf\":{\"@id\":\"https:\/\/www.vsl.nl\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2023\/05\/VSL_labs-232-scaled.jpg\",\"datePublished\":\"2023-07-05T14:57:54+00:00\",\"dateModified\":\"2026-03-23T14:51:18+00:00\",\"author\":{\"@id\":\"https:\/\/www.vsl.nl\/#\/schema\/person\/afec8fd6398b050db8b6014a5370fa23\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/#primaryimage\",\"url\":\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2023\/05\/VSL_labs-232-scaled.jpg\",\"contentUrl\":\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2023\/05\/VSL_labs-232-scaled.jpg\",\"width\":2560,\"height\":1707},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.vsl.nl\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Metrology for temporal light modulation\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.vsl.nl\/#website\",\"url\":\"https:\/\/www.vsl.nl\/\",\"name\":\"VSL\",\"description\":\"Nationaal Metrologisch Instituut\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.vsl.nl\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.vsl.nl\/#\/schema\/person\/afec8fd6398b050db8b6014a5370fa23\",\"name\":\"VSL_admin\",\"sameAs\":[\"http:\/\/vsl.nl\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Metrology for temporal light modulation - VSL","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/","og_locale":"en_US","og_type":"article","og_title":"Metrology for temporal light modulation - VSL","og_description":"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)","og_url":"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/","og_site_name":"VSL","article_published_time":"2023-07-05T14:57:54+00:00","article_modified_time":"2026-03-23T14:51:18+00:00","og_image":[{"width":2560,"height":1707,"url":"https:\/\/www.vsl.nl\/wp-content\/uploads\/2023\/05\/VSL_labs-232-scaled.jpg","type":"image\/jpeg"}],"author":"VSL_admin","twitter_card":"summary_large_image","twitter_misc":{"Written by":"VSL_admin","Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/#article","isPartOf":{"@id":"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/"},"author":{"name":"VSL_admin","@id":"https:\/\/www.vsl.nl\/#\/schema\/person\/afec8fd6398b050db8b6014a5370fa23"},"headline":"Metrology for temporal light modulation","datePublished":"2023-07-05T14:57:54+00:00","dateModified":"2026-03-23T14:51:18+00:00","mainEntityOfPage":{"@id":"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/"},"wordCount":592,"image":{"@id":"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/#primaryimage"},"thumbnailUrl":"https:\/\/www.vsl.nl\/wp-content\/uploads\/2023\/05\/VSL_labs-232-scaled.jpg","articleSection":["Health and Environment","Projects"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/","url":"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/","name":"Metrology for temporal light modulation - VSL","isPartOf":{"@id":"https:\/\/www.vsl.nl\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/#primaryimage"},"image":{"@id":"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/#primaryimage"},"thumbnailUrl":"https:\/\/www.vsl.nl\/wp-content\/uploads\/2023\/05\/VSL_labs-232-scaled.jpg","datePublished":"2023-07-05T14:57:54+00:00","dateModified":"2026-03-23T14:51:18+00:00","author":{"@id":"https:\/\/www.vsl.nl\/#\/schema\/person\/afec8fd6398b050db8b6014a5370fa23"},"breadcrumb":{"@id":"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/#primaryimage","url":"https:\/\/www.vsl.nl\/wp-content\/uploads\/2023\/05\/VSL_labs-232-scaled.jpg","contentUrl":"https:\/\/www.vsl.nl\/wp-content\/uploads\/2023\/05\/VSL_labs-232-scaled.jpg","width":2560,"height":1707},{"@type":"BreadcrumbList","@id":"https:\/\/www.vsl.nl\/en\/projects\/metrology-for-temporal-light-modulation\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.vsl.nl\/en\/"},{"@type":"ListItem","position":2,"name":"Metrology for temporal light modulation"}]},{"@type":"WebSite","@id":"https:\/\/www.vsl.nl\/#website","url":"https:\/\/www.vsl.nl\/","name":"VSL","description":"Nationaal Metrologisch Instituut","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.vsl.nl\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.vsl.nl\/#\/schema\/person\/afec8fd6398b050db8b6014a5370fa23","name":"VSL_admin","sameAs":["http:\/\/vsl.nl"]}]}},"_links":{"self":[{"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/posts\/5621","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/comments?post=5621"}],"version-history":[{"count":0,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/posts\/5621\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/media\/5629"}],"wp:attachment":[{"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/media?parent=5621"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/categories?post=5621"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/tags?post=5621"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}