{"product_id":"double-ring-cob-circular-led-chip-3v-4v-50mm-2w-diy-light-plate","title":"Double Ring COB Circular LED Chip 3V–4V 50mm 2W | DIY Light","description":"\u003ch2\u003eDouble Ring COB Circular LED Light Chip – 3V–4V DC, 50mm Diameter\u003c\/h2\u003e\n\u003cp\u003eUpgrade your DIY lighting builds with this compact and efficient \u003cstrong\u003eDouble Ring COB (Chip-on-Board) Circular LED Light Plate\u003c\/strong\u003e. Designed for hobbyists, makers, and automotive enthusiasts alike, this 50mm round COB module delivers bright, consistent illumination across a wide range of applications — all at just 2W of power draw.\u003c\/p\u003e\n\n\u003cp\u003eBuilt on an \u003cstrong\u003ealuminum-alloy substrate\u003c\/strong\u003e for excellent heat dissipation and long-term stability, this LED chip features ultra-low light attenuation (less than 1% over 1,000 hours) so your projects stay bright for longer. Choose from Warm White, Cold White, or Middle White color temperatures to suit your exact lighting needs.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠ Important Notice:\u003c\/strong\u003e A heatsink or radiator \u003cem\u003emust\u003c\/em\u003e be attached when operating this LED chip. Running without thermal management will shorten the component's lifespan.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Voltage:\u003c\/strong\u003e DC 3V – 4V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 2W\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Current:\u003c\/strong\u003e 1700mA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCOB Diameter:\u003c\/strong\u003e 50mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLighting Area Diameters:\u003c\/strong\u003e 42mm (outer ring) \/ 28mm (inner ring)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum-alloy plate\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLight Colors Available:\u003c\/strong\u003e Warm White \/ Cold White \/ Middle White\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLight Attenuation:\u003c\/strong\u003e \u0026lt;1% over 1,000 hours\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Contents:\u003c\/strong\u003e 1× Round COB LED Light Chip\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAutomotive accent and working lights\u003c\/li\u003e\n  \u003cli\u003eEmergency and portable lighting\u003c\/li\u003e\n  \u003cli\u003eIndoor DIY LED lighting projects\u003c\/li\u003e\n  \u003cli\u003eDecorative lighting installations\u003c\/li\u003e\n  \u003cli\u003eElectronics prototyping and maker builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Choose This COB LED Chip?\u003c\/h3\u003e\n\u003cp\u003eCOB (Chip-on-Board) technology packs multiple LED dies directly onto a single substrate, resulting in a much higher light density and a smoother, more uniform beam compared to traditional single LEDs. The double-ring layout maximizes luminous output within the compact 50mm footprint, making it ideal for space-constrained builds.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-relay-module-dc-3-3v-24v-optocoupler-arduino\"\u003e1-Channel Relay Module DC 3.3V–24V Optocoupler for Arduino\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-25mm-1000-turn-precision-copper-inductor-coil-diy-electronics\"\u003e0.25mm 1000-Turn Precision Copper Inductor Coil for DIY Circuits\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/038-inch-1280x720p-micro-display-diy-hdmi-driver-board-kit\"\u003e0.38\" 1280x720P Micro Display DIY Kit with HDMI Driver Board\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more information on LED lighting standards and energy efficiency, visit the U.S. Department of Energy – LED Lighting Resource.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Light-emitting_diode\" target=\"_blank\" rel=\"noopener\"\u003eLight-emitting diode\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What voltage does this COB LED chip require?\u003c\/h4\u003e\n\u003cp\u003eA: This double ring COB LED chip operates on DC 3V to 4V input voltage. Always use a regulated DC power supply within this range to ensure safe and stable operation.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Do I need a heatsink for this COB LED light plate?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — a heatsink or radiator is \u003cstrong\u003erequired\u003c\/strong\u003e. COB LED chips generate heat during operation, and without proper thermal management the chip's lifespan will be significantly reduced. Attach an appropriately sized aluminum heatsink before powering the module.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What color temperatures are available?\u003c\/h4\u003e\n\u003cp\u003eA: This COB LED chip is available in Warm White, Cold White, and Middle White. Select your preferred color temperature at the time of purchase to match your project's lighting requirements.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What are the main uses for this round COB LED module?\u003c\/h4\u003e\n\u003cp\u003eA: This versatile 50mm COB circular LED chip is suitable for car lights, working lights, emergency lights, decorative lighting, and a wide range of indoor DIY LED lighting projects.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What voltage does this COB LED chip require?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This double ring COB LED chip operates on DC 3V to 4V input voltage. Always use a regulated DC power supply within this range to ensure safe and stable operation.\"}}, {\"@type\": \"Question\", \"name\": \"Do I need a heatsink for this COB LED light plate?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — a heatsink or radiator is required. COB LED chips generate heat during operation, and without proper thermal management the chip's lifespan will be significantly reduced. Attach an appropriately sized aluminum heatsink before powering the module.\"}}, {\"@type\": \"Question\", \"name\": \"What color temperatures are available?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This COB LED chip is available in Warm White, Cold White, and Middle White. 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