{"product_id":"13w-21-inch-t5-fluorescent-tube-cool-white-4000k","title":"13W 21 Inch T5 Fluorescent Tube – Cool White 4000K","description":"\u003cdiv class=\"flex flex-col text-sm pb-25\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:7ad6cd31-02ea-45dd-8f3a-fcaa84433253-18\" data-testid=\"conversation-turn-6\" data-scroll-anchor=\"true\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"081e5adb-b3a8-47c4-942e-b845e159965c\" dir=\"auto\" data-message-model-slug=\"gpt-5-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"\u003e\n\u003ch2 data-section-id=\"rzkdgm\" data-start=\"349\" data-end=\"360\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"362\" data-end=\"765\"\u003eThe 13W 21-inch T5 fluorescent tube is a dependable lighting option designed to deliver efficient illumination in a compact form. With a cool white color temperature of 4000K, it produces a clean and balanced light that enhances visibility while maintaining a comfortable atmosphere. Its medium length makes it suitable for a variety of fixtures where both brightness and space efficiency are important.\u003c\/p\u003e\n\u003cp data-start=\"767\" data-end=\"1184\"\u003eProviding an output of 800 lumens, this tube ensures consistent lighting performance while maintaining relatively low energy consumption. With a lifespan of up to 5,000 hours, it is well-suited for applications where moderate usage is expected. Its slim 16mm diameter allows it to fit seamlessly into compatible T5 fittings, making it a versatile choice for residential, commercial, and display lighting environments.\u003c\/p\u003e\n\u003chr data-start=\"1186\" data-end=\"1189\"\u003e\n\u003ch2 data-section-id=\"vhwi7e\" data-start=\"1191\" data-end=\"1238\"\u003eWhy Choose a 13W 21 Inch T5 Fluorescent Tube\u003c\/h2\u003e\n\u003cp data-start=\"1240\" data-end=\"1657\"\u003eThis T5 fluorescent tube is an ideal solution for those seeking a balance between brightness, size, and energy efficiency. Its 21-inch length offers flexibility for installations that require a mid-sized tube, while still delivering sufficient illumination for everyday tasks. The cool white 4000K tone ensures clear and natural lighting, making it suitable for workspaces, retail areas, and general-purpose lighting.\u003c\/p\u003e\n\u003cp data-start=\"1659\" data-end=\"2028\"\u003eIn addition, its efficient design helps reduce energy usage while maintaining steady light output. The tube is built for reliable performance and is easy to install or replace within compatible fixtures. Whether used in homes, offices, or commercial settings, it provides a practical lighting solution that combines functionality, efficiency, and consistent brightness.\u003c\/p\u003e\n\u003chr data-start=\"2030\" data-end=\"2033\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"2035\" data-end=\"2050\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"2052\" data-end=\"2502\"\u003e\n\u003cli data-section-id=\"vdrxn5\" data-start=\"2052\" data-end=\"2094\"\u003eEnergy-efficient 13W power consumption\u003c\/li\u003e\n\u003cli data-section-id=\"s0vqzs\" data-start=\"2095\" data-end=\"2126\"\u003eBright output of 800 lumens\u003c\/li\u003e\n\u003cli data-section-id=\"icrzfe\" data-start=\"2127\" data-end=\"2186\"\u003eCool white 4000K color temperature for clear visibility\u003c\/li\u003e\n\u003cli data-section-id=\"dzr1cs\" data-start=\"2187\" data-end=\"2221\"\u003eMedium 21-inch (530 mm) length\u003c\/li\u003e\n\u003cli data-section-id=\"ljan9e\" data-start=\"2222\" data-end=\"2260\"\u003eSlim T5 design with 16 mm diameter\u003c\/li\u003e\n\u003cli data-section-id=\"15k8754\" data-start=\"2261\" data-end=\"2319\"\u003eSuitable for a variety of indoor lighting applications\u003c\/li\u003e\n\u003cli data-section-id=\"zthxgl\" data-start=\"2320\" data-end=\"2358\"\u003eStable and consistent illumination\u003c\/li\u003e\n\u003cli data-section-id=\"1l42fwv\" data-start=\"2359\" data-end=\"2396\"\u003eEasy installation and replacement\u003c\/li\u003e\n\u003cli data-section-id=\"3g9uad\" data-start=\"2397\" data-end=\"2450\"\u003eIdeal for residential and commercial environments\u003c\/li\u003e\n\u003cli data-section-id=\"d834g2\" data-start=\"2451\" data-end=\"2502\"\u003eReliable performance for general lighting needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2504\" data-end=\"2507\"\u003e\n\u003ch2 data-section-id=\"1cgu054\" data-start=\"2509\" data-end=\"2536\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul data-start=\"2538\" data-end=\"2926\"\u003e\n\u003cli data-section-id=\"81qhpu\" data-start=\"2538\" data-end=\"2558\"\u003e\n\u003cstrong data-start=\"2540\" data-end=\"2552\"\u003eWattage:\u003c\/strong\u003e 13W\u003c\/li\u003e\n\u003cli data-section-id=\"1dwr739\" data-start=\"2559\" data-end=\"2592\"\u003e\n\u003cstrong data-start=\"2561\" data-end=\"2575\"\u003eTube Type:\u003c\/strong\u003e T5 Fluorescent\u003c\/li\u003e\n\u003cli data-section-id=\"c3bsrk\" data-start=\"2593\" data-end=\"2627\"\u003e\n\u003cstrong data-start=\"2595\" data-end=\"2606\"\u003eLength:\u003c\/strong\u003e 530 mm (21 inches)\u003c\/li\u003e\n\u003cli data-section-id=\"aek2tu\" data-start=\"2628\" data-end=\"2651\"\u003e\n\u003cstrong data-start=\"2630\" data-end=\"2643\"\u003eDiameter:\u003c\/strong\u003e 16 mm\u003c\/li\u003e\n\u003cli data-section-id=\"f399np\" data-start=\"2652\" data-end=\"2697\"\u003e\n\u003cstrong data-start=\"2654\" data-end=\"2676\"\u003eColor Temperature:\u003c\/strong\u003e 4000K (Cool White)\u003c\/li\u003e\n\u003cli data-section-id=\"28c6sj\" data-start=\"2698\" data-end=\"2733\"\u003e\n\u003cstrong data-start=\"2700\" data-end=\"2720\"\u003eLuminous Output:\u003c\/strong\u003e 800 lumens\u003c\/li\u003e\n\u003cli data-section-id=\"r5i9mn\" data-start=\"2734\" data-end=\"2777\"\u003e\n\u003cstrong data-start=\"2736\" data-end=\"2757\"\u003eAverage Lifespan:\u003c\/strong\u003e Up to 5,000 hours\u003c\/li\u003e\n\u003cli data-section-id=\"120n5d3\" data-start=\"2778\" data-end=\"2814\"\u003e\n\u003cstrong data-start=\"2780\" data-end=\"2796\"\u003eApplication:\u003c\/strong\u003e Indoor lighting\u003c\/li\u003e\n\u003cli data-section-id=\"e0hyl4\" data-start=\"2815\" data-end=\"2864\"\u003e\n\u003cstrong data-start=\"2817\" data-end=\"2835\"\u003eLight Quality:\u003c\/strong\u003e Neutral white illumination\u003c\/li\u003e\n\u003cli data-section-id=\"15e95ud\" data-start=\"2865\" data-end=\"2926\"\u003e\n\u003cstrong data-start=\"2867\" data-end=\"2889\"\u003eEnergy Efficiency:\u003c\/strong\u003e Moderate energy-saving performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2928\" data-end=\"2931\"\u003e\n\u003ch2 data-section-id=\"1xvwnkw\" data-start=\"2933\" data-end=\"2940\"\u003eFAQs\u003c\/h2\u003e\n\u003cp data-start=\"2942\" data-end=\"3085\"\u003e\u003cstrong data-start=\"2942\" data-end=\"3000\"\u003e1. What type of fittings is this tube compatible with?\u003c\/strong\u003e\u003cbr data-start=\"3000\" data-end=\"3003\"\u003eIt is compatible with T5 fixtures designed for 21-inch (530 mm) fluorescent tubes.\u003c\/p\u003e\n\u003cp data-start=\"3087\" data-end=\"3251\"\u003e\u003cstrong data-start=\"3087\" data-end=\"3144\"\u003e2. Is the 4000K light suitable for work environments?\u003c\/strong\u003e\u003cbr data-start=\"3144\" data-end=\"3147\"\u003eYes, the cool white 4000K light provides clear and neutral illumination, ideal for tasks and workspaces.\u003c\/p\u003e\n\u003cp data-start=\"3253\" data-end=\"3364\"\u003e\u003cstrong data-start=\"3253\" data-end=\"3298\"\u003e3. How much power does this tube consume?\u003c\/strong\u003e\u003cbr data-start=\"3298\" data-end=\"3301\"\u003eIt consumes 13 watts while delivering 800 lumens of brightness.\u003c\/p\u003e\n\u003cp data-start=\"3366\" data-end=\"3506\"\u003e\u003cstrong data-start=\"3366\" data-end=\"3419\"\u003e4. What is the lifespan of this fluorescent tube?\u003c\/strong\u003e\u003cbr data-start=\"3419\" data-end=\"3422\"\u003eThe tube has an average lifespan of up to 5,000 hours under normal usage conditions.\u003c\/p\u003e\n\u003cp data-start=\"3508\" data-end=\"3695\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"3508\" data-end=\"3555\"\u003e5. Where can this tube be used effectively?\u003c\/strong\u003e\u003cbr data-start=\"3555\" data-end=\"3558\"\u003eIt is suitable for offices, retail spaces, kitchens, display units, and other indoor lighting applications requiring balanced brightness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e","brand":"CK-Electricals","offers":[{"title":"Default Title","offer_id":57216337248638,"sku":null,"price":4.47,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0985\/3832\/4350\/files\/T5Tube_307cd532-87aa-4b07-981f-ccaa5d7cd80e.jpg?v=1775517547","url":"https:\/\/ssmelectric.co.uk\/products\/13w-21-inch-t5-fluorescent-tube-cool-white-4000k","provider":"SSM ELECTRIC","version":"1.0","type":"link"}