{"id":18071,"date":"2026-07-02T09:20:38","date_gmt":"2026-07-02T01:20:38","guid":{"rendered":"https:\/\/long-join.com\/?p=18071"},"modified":"2026-07-02T09:20:41","modified_gmt":"2026-07-02T01:20:41","slug":"how-to-judge-whether-a-supplier-has-genuine-ul-ce-certifications","status":"publish","type":"post","link":"https:\/\/long-join.com\/pt\/how-to-judge-whether-a-supplier-has-genuine-ul-ce-certifications\/","title":{"rendered":"How To Judge Whether A Supplier Has Genuine UL\/CE Certifications?"},"content":{"rendered":"
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How To Judge Whether A Supplier Has Genuine UL\/CE Certifications?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tNosso Produto<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tcat\u00e1logos de produtos<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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Introduzir<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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You find a new supplier. Price looks good. Catalog’s clean. They tell you, “We have UL and CE certificates.”<\/p>

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Sounds great, right? Except here’s the thing: are they real?<\/p>

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For anyone buying photocells, sensors, or street light controllers, fake certification isn’t some abstract problem. It’s real. It can mess with customs. Delay projects. Tank product safety. Wreck your brand if something goes wrong on-site.<\/p>

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This guide walks you through checking UL<\/u><\/a>\u00a0e CE documents<\/u><\/a>\u00a0without needing an auditor. It also shows what separates a legit supplier from one you should avoid.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Why Is Fake Certification Such A Hidden Problem?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Because it stays hidden until it costs money.<\/p>

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Most buyers ask for a PDF certificate, get it, and relax. Problem is\u2014a PDF can be edited. Copied. Used for the wrong product. It can be expired. This happens more than you’d think in cross-border supply chains and OEM deals.<\/p>

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Outdoor lighting products make this worse. A photocell switch\u00a0sitting outside has to handle heat, rain, dust, voltage spikes. If it wasn’t actually tested, it’ll fail. Probably quickly.<\/p>

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And if customs catches fake certification? Your order gets held. Project delays. Extra storage costs. Replacement headaches. In the worst cases\u2014and this matters\u2014the buyer, brand owner, or engineer might face legal liability if something actually breaks.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Fake Certification Risk<\/b><\/strong><\/p><\/td>

What Happens<\/b><\/strong><\/p><\/td>

Why You Should Care<\/b><\/strong><\/p><\/td><\/tr>

Edited or fake certificate<\/p><\/td>

Customs stops shipment<\/p><\/td>

Project timeline gets wrecked<\/p><\/td><\/tr>

Wrong product model<\/p><\/td>

Product wasn’t tested<\/p><\/td>

Quality problems appear later<\/p><\/td><\/tr>

Expired document<\/p><\/td>

No current compliance proof<\/p><\/td>

You might have to replace everything<\/p><\/td><\/tr>

Poor factory quality<\/p><\/td>

More failures in the field<\/p><\/td>

Maintenance costs spike<\/p><\/td><\/tr>

False claims<\/p><\/td>

Legal and reputation damage<\/p><\/td>

Customer trust gets destroyed<\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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How Do You Actually Verify A UL Certificate?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Don’t just read a PDF. That’s useless.<\/p>

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Get the UL E-File number from the supplier. This number starts with “E” and traces the certified company or product. If they can’t provide it? Red flag. Slow down.<\/p>

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Then search it in UL Product iQ<\/u><\/a>. Use the E-File, company name, or product type. Everything should match what the supplier told you. Company name. Product category. Specific models covered. All of it needs to line up.<\/p>

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Longjoin actually does this right. Their UL-listed products like the JL-428C photocell sensor <\/u><\/a>switch show the certification clearly on the product pages. You can compare what they claim against what they’re actually selling. Makes it easy.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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What Do You Actually Need To Check For CE?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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People get CE wrong constantly. They think it’s one certificate from one testing company. It’s not.<\/p>

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CE is usually based on an EU Declaration of Conformity<\/u><\/a>\u2014a DoC. That’s the formal document where the manufacturer declares the product meets EU rules.<\/p>

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A real DoC should have the manufacturer’s name, address, product name, product model, the standards applied, a date, and an actual signature. If any of that’s missing? Weak document.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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240XA nema receptacle<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Ask for the test reports behind the DoC. These should come from a real testing body. And they should match your exact product model. If the report is for a different model, the CE claim doesn’t protect anything.<\/p>

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The label on the product also matters. A proper CE label includes the CE mark, manufacturer information, product ratings, and other required details. No shortcuts.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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CE Item To Check<\/b><\/strong><\/p><\/td>

What You Should See<\/b><\/strong><\/p><\/td>

Warning Sign<\/b><\/strong><\/p><\/td><\/tr>

DoC document<\/p><\/td>

Signed declaration with company details<\/p><\/td>

No signature, no company address listed<\/p><\/td><\/tr>

Modelo do produto<\/p><\/td>

Same model as what you’re ordering<\/p><\/td>

Model number missing or different<\/p><\/td><\/tr>

Test report<\/p><\/td>

Connected to your exact product<\/p><\/td>

Report is for a completely different product<\/p><\/td><\/tr>

Label<\/p><\/td>

Clear CE mark and product information<\/p><\/td>

Bad printing, incomplete or blurry<\/p><\/td><\/tr>

Standards listed<\/p><\/td>

Relevant EU standards mentioned<\/p><\/td>

Just vague language, no specifics<\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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What Tricks Do Fraudsters Actually Pull?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Fake certification doesn’t always look fake immediately. Good fraudsters make it look real enough.<\/p>

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One common trick? Using an expired certificate. Real document from years ago when they were certified. But current production? Never tested. Another common move is changing the model number on a legitimate document.<\/p>

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Some suppliers also steal certificates from other factories. Product looks similar, but it wasn’t made under any certified system. UL and CE aren’t transferable like that. They’re tied to specific products, specific factories, and specific quality control procedures.<\/p>

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Watch out for weak test reports too. Report looks technical? Doesn’t matter. Technical-looking doesn’t equal legitimate.<\/p>

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And when a supplier says “all our products are certified” but can’t show you the exact document for the exact product? That’s a sign they’re hiding something.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Fotocontrole CE<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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What Separates A Real Certified Supplier From A Fraud?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Real suppliers don’t hide documents. They hand them over. They explain what testing covered. They show exactly which models are included.<\/p>

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Real suppliers also keep production consistent. Certification isn’t a one-time test and done. It’s about making the same quality over and over. Factory audits. Quality systems. That’s what matters.<\/p>

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Jun\u00e7\u00e3o longa<\/u><\/a>\u00a0does this. They list their certifications\u2014CE, CB, FCC, RoHS<\/u><\/a>, Zhaga Book 18, UL, UKCA<\/u><\/a>, ISO 9001:2015\u2014on a dedicated quality certificate page. Not buried in some random PDF. Transparent.<\/p>

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They also have individual product pages for photocell controls, Soquetes NEMA<\/u><\/a>, Zhaga sockets, lighting control products. You can check product type. Check the model. Check the certification. You’re getting facts, not just sales talk.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Tipo de certifica\u00e7\u00e3o<\/b><\/strong><\/p><\/td>

What To Look For<\/b><\/strong><\/p><\/td>

Real Supplier Advantage<\/b><\/strong><\/p><\/td><\/tr>

UL<\/p><\/td>

E-File number, official database confirmation, model match<\/p><\/td>

Clear product lines and model information<\/p><\/td><\/tr>

CE<\/p><\/td>

DoC document, test report, product label<\/p><\/td>

International certificate page with details<\/p><\/td><\/tr>

ISO<\/p><\/td>

Quality system proof and factory procedures<\/p><\/td>

ISO 9001:2015 management support shown<\/p><\/td><\/tr>

Factory Audit<\/p><\/td>

Production control and quality inspection<\/p><\/td>

Visible process control for consistent supply<\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Perguntas frequentes<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\tHow Do I Actually Verify A UL Certificate On The UL Website?<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t
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Get the UL E-File number from the supplier. Go to UL Product iQ and search it. Check that the company, product category, and model all match their claims.<\/p><\/span>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\tWhy Is CE A DoC Instead Of Just A Regular Certificate?<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t
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CE is based on the manufacturer's declaration that the product meets EU rules. The DoC is the official proof of that declaration. It's different from testing certifications.<\/p><\/span>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\tWhat Do Longjoin's Certifications Actually Show?<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t
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They show that Longjoin's products meet international quality and safety standards for lighting controls. Proves they're actually tested.<\/p><\/span>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\tShould A Real Supplier Provide Audit Reports?<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t
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Yes. A serious supplier should be willing to share quality system proof when you ask, especially for large orders.<\/p><\/span>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\tWhat Else Should You Check Besides Certifications?<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t
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Factory history. Product experience. Customer reviews. Delivery track record. How fast they respond to problems after sale. All of it matters.<\/p><\/span>\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Conclus\u00e3o<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Fake UL or CE certification creates real problems. Customs holds. Project delays. Higher failure rates. Maintenance nightmares. Damaged reputation.<\/b><\/strong><\/p>

\u00a0<\/b><\/strong><\/p>

Protect yourself by checking everything carefully. Official database. Model number matching. Label review. Factory verification.<\/b><\/strong><\/p>

\u00a0<\/b><\/strong><\/p>

For anyone buying <\/b><\/strong>fotoc\u00e9lulas<\/b><\/strong>, photocontrols, or <\/b><\/strong>controladores de ilumina\u00e7\u00e3o<\/b><\/strong>, a genuine supplier should make verification simple. Clear documents. Models that match. Real quality systems. That’s when you can actually buy with confidence.<\/b><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Links externos:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\u25cfhttps:\/\/www.ul.com\/services\/certification
\u25cfhttps:\/\/europa.eu\/youreurope\/business\/product-requirements\/labels-markings\/ce-marking\/index_en.htm
\u25cfhttps:\/\/productiq.ulprospector.com\/
\u25cfhttps:\/\/europa.eu\/youreurope\/business\/product-requirements\/compliance\/preparing-technical-documentation\/index_en.htm
\u25cfhttps:\/\/environment.ec.europa.eu\/topics\/waste-and-recycling\/rohs-directive_en
https:\/\/en.wikipedia.org\/wiki\/UKCA_marking<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

failure rates. Maintenance nightmares. Damaged reputation.
\nProtect yourself by checking everything carefully. Official database. Model number matching. Label review. Factory verification.
\nFor anyone buying photocells, photocontrols, or lighting controllers, a genuine supplier should make verification simple. Clear documents. Models that match. Real quality systems. That’s when you can actually buy with confidence.<\/p>","protected":false},"author":1,"featured_media":18072,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"footnotes":""},"categories":[1,68],"tags":[],"class_list":["post-18071","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-long-join-blog","category-recent-post"],"acf":[],"_links":{"self":[{"href":"https:\/\/long-join.com\/pt\/wp-json\/wp\/v2\/posts\/18071","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/long-join.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/long-join.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/long-join.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/long-join.com\/pt\/wp-json\/wp\/v2\/comments?post=18071"}],"version-history":[{"count":7,"href":"https:\/\/long-join.com\/pt\/wp-json\/wp\/v2\/posts\/18071\/revisions"}],"predecessor-version":[{"id":18079,"href":"https:\/\/long-join.com\/pt\/wp-json\/wp\/v2\/posts\/18071\/revisions\/18079"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/long-join.com\/pt\/wp-json\/wp\/v2\/media\/18072"}],"wp:attachment":[{"href":"https:\/\/long-join.com\/pt\/wp-json\/wp\/v2\/media?parent=18071"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/long-join.com\/pt\/wp-json\/wp\/v2\/categories?post=18071"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/long-join.com\/pt\/wp-json\/wp\/v2\/tags?post=18071"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}