{"product_id":"led-cob-28mm-3w-lumina-cald-rece","title":"28mm COB LED - Warm\/Cool Light","description":"\u003cdiv class=\"cl-desc\"\u003e\n\n\n\u003cdiv class=\"cl-intro\"\u003e\n\n\u003ch2\u003e3W 28mm COB LED Chip with Dual Color Temperature\u003c\/h2\u003e\n\n\u003cp\u003eThe 28mm 3W COB LED Chip is a compact light source with injected COB technology, available in a 2-in-1 version with cool white (6000-6500K) and warm white (2800-3200K) color temperatures. The aluminum alloy support ensures efficient heat dissipation, extending the component's lifespan. Suitable for DIY lighting projects, chip replacement in existing spotlights, or the construction of new lighting fixtures.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv class=\"cl-benefits\"\u003e\n\n\u003ch2\u003eWhat you get with this product\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli\u003eTwo color temperatures in one chip — you can use cool white, warm white, or both simultaneously to achieve neutral light, without purchasing separate components\u003c\/li\u003e\n\n\u003cli\u003eLuminous efficiency of 100-110 lm\/W — 300-330 lumens with a consumption of only 3W, comparable output to higher power modules\u003c\/li\u003e\n\n\u003cli\u003eIntegrated aluminum support with mounting slots — uniform cooling without the need for an additional MCPCB plate\u003c\/li\u003e\n\n\u003cli\u003eCompatible with a wide range of applications — recessed spotlights, office appliances, automotive lighting, projectors, illuminated signs, and school projects\u003c\/li\u003e\n\n\u003cli\u003eColor rendering index Ra greater than 80 — illuminated object colors appear natural and faithful, without visible distortion\u003c\/li\u003e\n\n\u003cli\u003eLifespan of up to 20,000 hours — infrequent replacements and reduced long-term maintenance costs\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv class=\"cl-how\"\u003e\n\n\u003ch2\u003eHow it works and how to install it\u003c\/h2\u003e\n\n\u003cp\u003eThe 28mm COB LED chip has four power contacts (2 positive and 2 negative), allowing independent control of the two color temperatures by separately powering each pair. Mounting is done on a metal surface or heat sink, always with thermal paste applied between the chip and the support, to prevent overheating. Connection is made to a stabilized DC source of 8.7-9V and 280-300mA, without the need for special equipment — basic electronics knowledge is sufficient.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv class=\"cl-faq\"\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cdiv class=\"cl-faq-item\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use this chip directly at 12V?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eNo. The nominal supply voltage is 8.7-9V DC. Powering at 12V without an adequate driver will irreversibly damage the chip.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"cl-faq-item\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I need a separate heat sink, or is the included support sufficient?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe integrated aluminum support provides basic cooling, but for continuous use at maximum power, an additional heat sink and thermal paste are recommended to keep the temperature within safe limits.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"cl-faq-item\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I get neutral light with this 2-in-1 chip?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBy simultaneously powering both pairs of contacts (cool white and warm white), the two light sources combine, and the perceived result is light with a neutral temperature, between the two extreme values.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv class=\"cl-specs\"\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable\u003e\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eModel\u003c\/td\u003e\n\n\u003ctd\u003eLED-H28-2B3C2\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePower\u003c\/td\u003e\n\n\u003ctd\u003e3W\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\n\u003ctd\u003e8.7 - 9V DC\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eCurrent\u003c\/td\u003e\n\n\u003ctd\u003e280 - 300 mA\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eColor Temperature (cool white)\u003c\/td\u003e\n\n\u003ctd\u003e6000 - 6500K\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eColor Temperature (warm white)\u003c\/td\u003e\n\n\u003ctd\u003e2800 - 3200K\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eLuminous Flux\u003c\/td\u003e\n\n\u003ctd\u003e300 - 330 lm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eLuminous Efficiency\u003c\/td\u003e\n\n\u003ctd\u003e100 - 110 lm\/W\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eColor Rendering Index (CRI)\u003c\/td\u003e\n\n\u003ctd\u003eRa greater than 80\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eChip Diameter\u003c\/td\u003e\n\n\u003ctd\u003e28 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eThickness\u003c\/td\u003e\n\n\u003ctd\u003e1.8 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eSupport Type\u003c\/td\u003e\n\n\u003ctd\u003eRound aluminum alloy with mounting slots\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eNumber of Contacts\u003c\/td\u003e\n\n\u003ctd\u003e4 (2 positive + 2 negative)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eLifespan\u003c\/td\u003e\n\n\u003ctd\u003eup to 20,000 hours\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eTechnology Type\u003c\/td\u003e\n\n\u003ctd\u003eInjected COB\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eSKU\u003c\/td\u003e\n\n\u003ctd\u003eQ-20C055\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003cdiv class=\"cl-warranty\"\u003e\n\n\u003ch2\u003eWarranty and Support\u003c\/h2\u003e\n\n\u003cp\u003eThe product benefits from a 2-year legal warranty in accordance with current Romanian legislation. We accept returns within 30 days from the date of receipt, without the need for justification. Delivery is carried out quickly by courier within Romania.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\n\u003c\/div\u003e","brand":"OEM","offers":[{"title":"Default Title","offer_id":56801659683147,"sku":"Q-20C055","price":1.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1032\/2067\/4891\/files\/Led-Cob-28mm-_E2_80_93-3W-Lumina-CaldRece_55d35290-9743-4527-a48b-a851b7251c85.jpg?v=1773834134","url":"https:\/\/classlights.eu\/hu-eu\/products\/led-cob-28mm-3w-lumina-cald-rece","provider":"ClassLights","version":"1.0","type":"link"}