{"id":21004,"date":"2026-11-07T10:08:40","date_gmt":"2026-11-07T02:08:40","guid":{"rendered":"https:\/\/www.wehopower.com\/news\/lighting-data-loss-restart-power-supply-load-state\/"},"modified":"2026-11-07T10:08:40","modified_gmt":"2026-11-07T02:08:40","slug":"lighting-data-loss-restart-power-supply-load-state","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/ar\/news\/lighting-data-loss-restart-power-supply-load-state\/","title":{"rendered":"Lighting Data Loss and Restart: Include the Retained Load State"},"content":{"rendered":"<figure class=\"hero\"><a href=\"https:\/\/www.wehopower.com\/ar\/product\/12v-24v-power-supply-400w-transformer-led-driver-super-thin-super\/\"><img decoding=\"async\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/hero-32.webp\" alt=\"Lighting Data Loss and Restart: Include the Retained Load State  title=\" fetchpriority=\"high\" lighting data loss and restart: include the retained load state title=\"\"><\/a><figcaption>Lighting-control troubleshooting with WL-400-12: the data connector is visibly open while separate DC power pairs remain connected and the light is shown lit. Actual retained-output behavior depends on the selected controller and luminaire and requires testing. Original product artwork retained. AI-assisted illustration.<\/figcaption><a class=\"original-link\" href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/original-25.jpg\">View original product image<\/a><\/figure>\n<p>When lighting data disappears, the LED load may remain on, fade, change to a preset or follow another documented response. Include that retained or fallback state in the electrical acceptance record. Turning off a console is not the same event as removing power from the receiver or the DC source.<\/p>\n<p>This guide is for OEMs integrating a constant-voltage source with a separate lighting controller and compatible modules. The WEHO WL-400-12 photo identifies the source example; it does not make the supply a DMX receiver, an emergency-lighting device or a qualified match for a particular controller.<\/p>\n<nav class=\"toc\" aria-label=\"On this page\">\n<ol>\n<li><a href=\"#draw-the-state-boundary\">Separate data, controller power and source power<\/a><\/li>\n<li><a href=\"#define-the-required-response\">Define the required lighting response for each event<\/a><\/li>\n<li><a href=\"#connect-the-load-record\">Calculate energy and current for the actual state<\/a><\/li>\n<li><a href=\"#test-the-transition\">Observe the transition and the stable destination<\/a><\/li>\n<li><a href=\"#keep-control-and-protection-separate\">Keep control response separate from protective isolation<\/a><\/li>\n<li><a href=\"#release-the-state-matrix\">Hand over a configuration and state matrix<\/a><\/li>\n<\/ol>\n<\/nav>\n<section id=\"draw-the-state-boundary\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u062c\u062f\u0648\u0644 \u0627\u0644\u0645\u062d\u062a\u0648\u064a\u0627\u062a<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u062a\u0628\u062f\u064a\u0644<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.wehopower.com\/ar\/news\/lighting-data-loss-restart-power-supply-load-state\/#Separate_data_controller_power_and_source_power\" >Separate data, controller power and source power<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.wehopower.com\/ar\/news\/lighting-data-loss-restart-power-supply-load-state\/#Define_the_required_lighting_response_for_each_event\" >Define the required lighting response for each event<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.wehopower.com\/ar\/news\/lighting-data-loss-restart-power-supply-load-state\/#Calculate_energy_and_current_for_the_actual_state\" >Calculate energy and current for the actual state<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.wehopower.com\/ar\/news\/lighting-data-loss-restart-power-supply-load-state\/#Observe_the_transition_and_the_stable_destination\" >Observe the transition and the stable destination<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.wehopower.com\/ar\/news\/lighting-data-loss-restart-power-supply-load-state\/#Keep_control_response_separate_from_protective_isolation\" >Keep control response separate from protective isolation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.wehopower.com\/ar\/news\/lighting-data-loss-restart-power-supply-load-state\/#Hand_over_a_configuration_and_state_matrix\" >Hand over a configuration and state matrix<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.wehopower.com\/ar\/news\/lighting-data-loss-restart-power-supply-load-state\/#Lighting_interruption_and_restoration_state_matrix\" >Lighting interruption and restoration state matrix<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.wehopower.com\/ar\/news\/lighting-data-loss-restart-power-supply-load-state\/#Sources_and_further_reading\" >Sources and further reading<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Separate_data_controller_power_and_source_power\"><\/span>Separate data, controller power and source power<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Draw three distinct paths: the data origin, the controller\u2019s own power and the power delivered to the lighting modules. Record which remain energized when an operator turns one item off. A lost network stream can leave the controller and lamps fully powered. A controller restart can occur while the source remains stable.<\/p>\n<p><a href=\"https:\/\/support.enttec.com\/cv-controllers\/cvc4-73926\/behaviour-on-dmx-loss\" target=\"_blank\" rel=\"noopener\">ENTTEC\u2019s CVC4 support guidance<\/a> documents a particular controller that retains the last frame when its data source stops while the controller remains powered. <a href=\"https:\/\/support.etcconnect.com\/ETC\/Getting_Started_with_ETC_and_FAQ\/Lights_Stuck_on_When_Power_Off_Console\" target=\"_blank\" rel=\"noopener\">ETC\u2019s explanation of lights staying on after console shutdown<\/a> gives other product-specific data-loss behaviours. These examples show why behaviour must be checked; they are not a claim that an unidentified controller behaves the same way.<\/p>\n<figure id=\"fig-diagram\" class=\"diagram\"><img decoding=\"async\" class=\"technical-desktop\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/diagram-32.svg\" alt=\"Lighting Data Loss and Restart: Include the Retained Load State  title=\" loading=\"lazy\" lighting data loss and restart: include the retained load state title=\"\"><img decoding=\"async\" class=\"technical-mobile\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/diagram-mobile-32.svg\" alt=\"Lighting Data Loss and Restart: Include the Retained Load State  title=\" loading=\"lazy\" lighting data loss and restart: include the retained load state title=\"\"><figcaption>Functional state diagram. No DMX function, fallback mode or emergency capability is attributed to WL-400.<\/figcaption><a class=\"original-link\" href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/diagram-32.svg\">Open full-size technical illustration<\/a><\/figure>\n<\/section>\n<section id=\"define-the-required-response\">\n<h2><span class=\"ez-toc-section\" id=\"Define_the_required_lighting_response_for_each_event\"><\/span>Define the required lighting response for each event<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Name the event, initial scene, maximum duration, desired response and restoration action. Include signal loss without power loss, controller-only reboot, source restoration and any applicable local override. Record firmware and configuration because a default or a changed preset can alter the load without changing the supply model.<\/p>\n<p>Do not label every fallback as \u201coff\u201d in the documentation. If the actual permitted response is to retain a bright state, treat it as a possible sustained demand. If a fade is required, the delay, duration and final state belong to the controller requirement, with the source remaining within its own documented operating conditions throughout.<\/p>\n<\/section>\n<section id=\"connect-the-load-record\">\n<h2><span class=\"ez-toc-section\" id=\"Calculate_energy_and_current_for_the_actual_state\"><\/span>Calculate energy and current for the actual state<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>For a hypothetical steady 12 V lighting assembly, assume the normal scene draws 8 A and a documented permitted retained scene draws 18 A. The corresponding output powers are 96 W and 216 W. If the retained state lasts 15 minutes, its delivered load energy is 216 \u00d7 0.25 = 54 Wh, compared with 24 Wh for the 8 A scene over the same period.<\/p>\n<div class=\"table-wrap\">\n<table>\n<thead>\n<tr>\n<th>Hypothetical state<\/th>\n<th>\u062d\u0627\u0636\u0650\u0631<\/th>\n<th>DC load power<\/th>\n<th>Energy in 15 min<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Normal scene<\/td>\n<td>8 A<\/td>\n<td>96 W<\/td>\n<td>24 Wh<\/td>\n<\/tr>\n<tr>\n<td>Permitted retained scene<\/td>\n<td>18 A<\/td>\n<td>216 W<\/td>\n<td>54 Wh<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>These are invented load examples. They do not establish WL-400 capability, AC input power, conversion efficiency, a thermal limit or a controller rating. Compare the actual worst permitted demand with the confirmed source, controller channels, common paths and installation conditions. Check transitions separately rather than using the steady arithmetic as a transient guarantee.<\/p>\n<\/section>\n<section id=\"test-the-transition\">\n<h2><span class=\"ez-toc-section\" id=\"Observe_the_transition_and_the_stable_destination\"><\/span>Observe the transition and the stable destination<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Prepare a controlled integration test using approved access to the data and control interfaces. Record the initial scene, precise event and time reference. Observe the light output, controller status and electrical demand during the event, after it settles and when the data returns. Keep enough time history to distinguish a short transition from an indefinitely retained state.<\/p>\n<p>The last successful bright scene may produce a different result from the normal demonstration sequence. Test the relevant initial conditions rather than assuming one data-loss trial covers all memories and presets. When required behaviour is uncertain, keep that configuration out of the released build until the controller documentation and test record establish it.<\/p>\n<\/section>\n<section id=\"keep-control-and-protection-separate\">\n<h2><span class=\"ez-toc-section\" id=\"Keep_control_response_separate_from_protective_isolation\"><\/span>Keep control response separate from protective isolation<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A scene going dark does not establish that hazardous energy has been isolated. A DC supply remaining within its voltage range does not prove that the controller\u2019s data-loss response meets the application requirement. Document each evidence owner separately, and use the equipment\u2019s approved isolation procedure for service.<\/p>\n<p>This article does not turn an ordinary lighting combination into emergency lighting or a safety function. If continued illumination or a particular fail response is required by the project\u2019s applicable rules, it needs the appropriate system specification and evidence. A configurable preset alone does not supply that evidence.<\/p>\n<figure id=\"fig-original\" class=\"product-original\"><a href=\"https:\/\/www.wehopower.com\/ar\/product\/12v-24v-power-supply-400w-transformer-led-driver-super-thin-super\/\"><img decoding=\"async\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/original-25.jpg\" alt=\"Lighting Data Loss and Restart: Include the Retained Load State  title=\" loading=\"lazy\" lighting data loss and restart: include the retained load state title=\"\"><\/a><figcaption>Original WL-400-12 photograph. Its 12 V, 33.3 A marking differs from the public page table; it is not an approved load or control-function specification.<\/figcaption><a class=\"original-link\" href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/original-25.jpg\">View original image<\/a><\/figure>\n<\/section>\n<section id=\"release-the-state-matrix\">\n<h2><span class=\"ez-toc-section\" id=\"Hand_over_a_configuration_and_state_matrix\"><\/span>Hand over a configuration and state matrix<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Include the controller identity, firmware, saved configuration, default scene and restoration behaviour with the supply and module BOM. The commissioning record should name the actual tested transitions and state the results against the agreed criteria. Identify which updates, substitutions or configuration resets require another review.<\/p>\n<p>The WL-400-12 photo reads 12 V, 33.3 A, while the public page table lists 27 A for its 12 V column and contains unrelated model text. This disagreement is unresolved; neither number is adopted as an installed capacity for this example. Request the applicable ordered-revision specification before source approval. The useful outcome is a complete load-state record that remains valid when normal control is interrupted, rather than a demonstration that works only while one console is sending a familiar scene.<\/p>\n<\/section>\n<section class=\"cta\">\n<p>Send the controller\u2019s documented loss-of-data response, recovery sequence, permitted retained scenes, current\/duration record and enclosure conditions for your <a href=\"https:\/\/www.wehopower.com\/ar\/product\/12v-24v-power-supply-400w-transformer-led-driver-super-thin-super\/\">WL-400-12 application<\/a>. Request the offered revision\u2019s confirmed input\/output limits and evaluate every required sustained state before approving the assembly.<\/p>\n<\/section>\n<section id=\"worksheet\" class=\"sheet\">\n<h2><span class=\"ez-toc-section\" id=\"Lighting_interruption_and_restoration_state_matrix\"><\/span>Lighting interruption and restoration state matrix<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"sheet-row\"><label>Source, controller and module revisions<input aria-label=\"Source, controller and module revisions\"><\/label><label>Controller firmware \/ saved configuration<input aria-label=\"Controller firmware \/ saved configuration\"><\/label><label>Required behaviour and event definition<input aria-label=\"Required behaviour and event definition\"><\/label><label>Demand and transition measurement method<input aria-label=\"Demand and transition measurement method\"><\/label><label>Application acceptance owner<input aria-label=\"Application acceptance owner\"><\/label><label>Change control \/ reviewer<input aria-label=\"Change control \/ reviewer\"><\/label><\/div>\n<div class=\"table-scroll\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Initial scene<\/th>\n<th scope=\"col\">Data \/ power event<\/th>\n<th scope=\"col\">Required destination<\/th>\n<th scope=\"col\">Observed current and timing<\/th>\n<th scope=\"col\">Restoration result<\/th>\n<th scope=\"col\">Disposition<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<\/tr>\n<tr>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Blank project worksheet. Enter verified project data; example calculations above are not measurements.<\/p>\n<\/section>\n<section class=\"source-list\">\n<h2><span class=\"ez-toc-section\" id=\"Sources_and_further_reading\"><\/span>Sources and further reading<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li><a href=\"https:\/\/www.wehopower.com\/ar\/product\/12v-24v-power-supply-400w-transformer-led-driver-super-thin-super\/\">WEHO WL-400 product page<\/a><\/li>\n<li><a href=\"https:\/\/support.enttec.com\/cv-controllers\/cvc4-73926\/behaviour-on-dmx-loss\" target=\"_blank\" rel=\"noopener\">ENTTEC CVC4 Behaviour on DMX loss<\/a><\/li>\n<li><a href=\"https:\/\/support.etcconnect.com\/ETC\/Getting_Started_with_ETC_and_FAQ\/Lights_Stuck_on_When_Power_Off_Console\" target=\"_blank\" rel=\"noopener\">ETC Lights Stuck on When Power Off Console<\/a><\/li>\n<\/ol>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Record lighting behaviour and electrical demand during data loss, controller restart and restoration so a normal show state cannot conceal an unsupported retained load.<\/p>","protected":false},"author":2,"featured_media":20991,"parent":0,"menu_order":10,"comment_status":"","ping_status":"","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[284],"class_list":["post-21004","news","type-news","status-publish","format-standard","has-post-thumbnail","hentry","news_category-product-articles","entry"],"acf":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/news\/21004","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/comments?post=21004"}],"version-history":[{"count":0,"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/news\/21004\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/media\/20991"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/media?parent=21004"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/news_category?post=21004"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}