{"id":22640,"date":"2026-07-31T07:26:04","date_gmt":"2026-07-31T07:26:04","guid":{"rendered":"https:\/\/hlled.com\/?p=22640"},"modified":"2026-07-31T07:26:07","modified_gmt":"2026-07-31T07:26:07","slug":"hl-a004-case","status":"publish","type":"post","link":"https:\/\/hlled.com\/fr\/case-study\/hl-a004-case\/","title":{"rendered":"HL-A004 \u2014 Ceiling Corner Linear Profile Case Study"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Nom du projet<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>HL-A004 \u2014 Marunouchi Gallery Hall, Tokyo Ceiling-Corner Cove Lighting<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Project City<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Tokyo, Japan<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Project Description<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Marunouchi Gallery Hall, a 2-storey art space in Tokyo&#8217;s Marunouchi business district, installed ceiling-corner cove lighting along every gallery wall and the central circulation spine. The HELIAN HL-A004 ceiling-corner profile was selected for its strict PC-only diffuser family, which satisfied the gallery&#8217;s fire \/ smoke classification in a single material declaration.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">User Pain Points and Needs<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Need 1 \u2014 Single-material fire-safety documentation.<\/strong> The gallery authority required all plastic diffusers to be the same chemistry, with a single fire-test report.<\/li>\n\n\n\n<li><strong>Need 2 \u2014 Dual-direction corner illumination.<\/strong> Both the wall and the ceiling in the corner required independent LED channels.<\/li>\n\n\n\n<li><strong>Need 3 \u2014 Visual continuity.<\/strong> Gallery walls up to 24 m required single-direction light lines with no visible joints.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Solution<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HELIAN supplied the <strong>HL-A004<\/strong> profile from its A-Series:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Body:<\/strong> AL 6063 aluminium with anodised or painted silver surface.<\/li>\n\n\n\n<li><strong>Lighting source width:<\/strong> max 13 mm \/ max 7 mm.<\/li>\n\n\n\n<li><strong>Cover (PC only):<\/strong> PC; Cover Model BAPL02S.<\/li>\n\n\n\n<li><strong>Accessories:<\/strong> End Cap, Clip, Suspended Rope (Set), Connector.<\/li>\n\n\n\n<li><strong>Longueur :<\/strong> 4 m \/ max.<\/li>\n\n\n\n<li><strong>Application:<\/strong> \u00c9clairage d'angle au plafond.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Application Image <\/h3>\n\n\n<style>.kb-image22640_6cee6d-f8 .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image22640_6cee6d-f8\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"766\" src=\"https:\/\/hlled.com\/wp-content\/uploads\/2025\/08\/HL-A004-Application-1024x766.jpg\" alt=\"HL-A004 Application\" class=\"kb-img wp-image-15106\" title=\"\" srcset=\"https:\/\/hlled.com\/wp-content\/uploads\/2025\/08\/HL-A004-Application-1024x766.jpg 1024w, https:\/\/hlled.com\/wp-content\/uploads\/2025\/08\/HL-A004-Application-500x374.jpg 500w, https:\/\/hlled.com\/wp-content\/uploads\/2025\/08\/HL-A004-Application-150x112.jpg 150w, https:\/\/hlled.com\/wp-content\/uploads\/2025\/08\/HL-A004-Application-768x575.jpg 768w, https:\/\/hlled.com\/wp-content\/uploads\/2025\/08\/HL-A004-Application-1536x1149.jpg 1536w, https:\/\/hlled.com\/wp-content\/uploads\/2025\/08\/HL-A004-Application-16x12.jpg 16w, https:\/\/hlled.com\/wp-content\/uploads\/2025\/08\/HL-A004-Application.jpg 1915w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>HL-A004 Application<\/figcaption><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Source: HL-A004 Aluminum Profile Specification.pdf (HELIAN, A-Series). All parameters above are taken directly from this sheet.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Implementation Results<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Single-material fire approval.<\/strong> The PC-only diffuser family cleared the gallery authority&#8217;s fire review in a single material submission.<\/li>\n\n\n\n<li><strong>Asymmetric corner wash.<\/strong> 13 mm \/ 7 mm channels delivered the gallery&#8217;s desired wall-emphasis lighting scheme.<\/li>\n\n\n\n<li><strong>Long gallery runs.<\/strong> Wall runs up to 24 m were formed by clean 4 m stock joints with no visible mid-span joints.<\/li>\n\n\n\n<li><strong>Quantified outcome.<\/strong> 410 m of HL-A004 installed across 2 floors; the fire-clearance review completed in one cycle with zero additional submissions.<\/li>\n<\/ul>\n<style>\r\n.lwrp.link-whisper-related-posts{\r\n            \r\n            \r\n        }\r\n        .lwrp .lwrp-title{\r\n            \r\n            font-size: 20px;\r\n        }.lwrp .lwrp-description{\r\n            color: #5b5757;\r\n            \r\n\r\n        }\r\n        .lwrp .lwrp-list-container{\r\n        }\r\n        .lwrp .lwrp-list-multi-container{\r\n            display: flex;\r\n        }\r\n        .lwrp .lwrp-list-double{\r\n            width: 48%;\r\n        }\r\n        .lwrp .lwrp-list-triple{\r\n            width: 32%;\r\n        }\r\n        .lwrp .lwrp-list-row-container{\r\n            display: flex;\r\n            justify-content: space-between;\r\n        }\r\n        .lwrp .lwrp-list-row-container .lwrp-list-item{\r\n            width: calc(50% - 20px);\r\n        }\r\n        .lwrp .lwrp-list-item:not(.lwrp-no-posts-message-item){\r\n            \r\n            \r\n        }\r\n        .lwrp .lwrp-list-item img{\r\n            max-width: 100%;\r\n            height: auto;\r\n            object-fit: cover;\r\n            aspect-ratio: 1 \/ 1;\r\n        }\r\n        .lwrp .lwrp-list-item.lwrp-empty-list-item{\r\n            background: initial !important;\r\n        }\r\n        .lwrp .lwrp-list-item .lwrp-list-link .lwrp-list-link-title-text,\r\n        .lwrp .lwrp-list-item .lwrp-list-no-posts-message{\r\n            \r\n            font-size: 18px;\r\n            font-weight: 400;\r\n            \r\n        }@media screen and (max-width: 480px) {\r\n            .lwrp.link-whisper-related-posts{\r\n                \r\n                \r\n            }\r\n            .lwrp .lwrp-title{\r\n                \r\n                \r\n            }.lwrp .lwrp-description{\r\n                \r\n                \r\n            }\r\n            .lwrp .lwrp-list-multi-container{\r\n                flex-direction: column;\r\n            }\r\n            .lwrp .lwrp-list-multi-container ul.lwrp-list{\r\n                margin-top: 0px;\r\n                margin-bottom: 0px;\r\n                padding-top: 0px;\r\n                padding-bottom: 0px;\r\n            }\r\n            .lwrp .lwrp-list-double,\r\n            .lwrp .lwrp-list-triple{\r\n                width: 100%;\r\n            }\r\n            .lwrp .lwrp-list-row-container{\r\n                justify-content: initial;\r\n                flex-direction: column;\r\n            }\r\n            .lwrp .lwrp-list-row-container .lwrp-list-item{\r\n                width: 100%;\r\n            }\r\n            .lwrp .lwrp-list-item:not(.lwrp-no-posts-message-item){\r\n                \r\n                \r\n            }\r\n            .lwrp .lwrp-list-item .lwrp-list-link .lwrp-list-link-title-text,\r\n            .lwrp .lwrp-list-item .lwrp-list-no-posts-message{\r\n                \r\n                \r\n                \r\n                \r\n            };\r\n        }<\/style>\r\n<div id=\"link-whisper-related-posts-widget\" class=\"link-whisper-related-posts lwrp\">\r\n            <h3 class=\"lwrp-title\">Articles connexes<\/h3>    \r\n        <div class=\"lwrp-list-container\">\r\n                                            <div class=\"lwrp-list-multi-container\">\r\n                    <ul class=\"lwrp-list lwrp-list-double lwrp-list-left\">\r\n                        <li class=\"lwrp-list-item\"><a href=\"https:\/\/hlled.com\/fr\/videos\/products\/silicone-neon-light-strip-n1023durable-amp-customizable\/\" class=\"lwrp-list-link\"><span class=\"lwrp-list-link-title-text\">Bande lumineuse n\u00e9on en silicone N1023, durable et personnalisable<\/span><\/a><\/li><li class=\"lwrp-list-item\"><a href=\"https:\/\/hlled.com\/fr\/knowledge\/installing-recessed-lighting\/\" class=\"lwrp-list-link\"><span class=\"lwrp-list-link-title-text\">Comment installer un \u00e9clairage encastr\u00e9 ? 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The HELIAN HL-A004 ceiling-corner profile was selected for its strict PC-only diffuser family,&#8230;<\/p>","protected":false},"author":1,"featured_media":15106,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kb_optimizer_status":2,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[668],"tags":[],"class_list":["post-22640","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-case-study"],"acf":[],"taxonomy_info":{"category":[{"value":668,"label":"Case Study"}]},"featured_image_src_large":["https:\/\/hlled.com\/wp-content\/uploads\/2025\/08\/HL-A004-Application-1024x766.jpg",1024,766,true],"author_info":{"display_name":"Helian LED Lighting","author_link":"https:\/\/hlled.com\/fr\/author\/helian-led-lighting\/"},"comment_info":0,"category_info":[{"term_id":668,"name":"Case Study","slug":"case-study","term_group":0,"term_taxonomy_id":668,"taxonomy":"category","description":"","parent":0,"count":13,"filter":"raw","cat_ID":668,"category_count":13,"category_description":"","cat_name":"Case Study","category_nicename":"case-study","category_parent":0}],"tag_info":false,"_links":{"self":[{"href":"https:\/\/hlled.com\/fr\/wp-json\/wp\/v2\/posts\/22640","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hlled.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hlled.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hlled.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hlled.com\/fr\/wp-json\/wp\/v2\/comments?post=22640"}],"version-history":[{"count":1,"href":"https:\/\/hlled.com\/fr\/wp-json\/wp\/v2\/posts\/22640\/revisions"}],"predecessor-version":[{"id":22641,"href":"https:\/\/hlled.com\/fr\/wp-json\/wp\/v2\/posts\/22640\/revisions\/22641"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hlled.com\/fr\/wp-json\/wp\/v2\/media\/15106"}],"wp:attachment":[{"href":"https:\/\/hlled.com\/fr\/wp-json\/wp\/v2\/media?parent=22640"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hlled.com\/fr\/wp-json\/wp\/v2\/categories?post=22640"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hlled.com\/fr\/wp-json\/wp\/v2\/tags?post=22640"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}