{"product_id":"3w-5w-7w-cob-led-chip-surface-light-source-high-power-long-cob-lamp-beads-with-gold-wire-heavy-gold-aluminum-substrate-120lm-w-80cri-3000k-6000k-for-indoor-lighting-commercial-fixtures","title":"3W 5W 7W COB LED Chip Surface Light Source High Power Long Cob Lamp Beads with Gold Wire Heavy Gold Aluminum Substrate 120LM\/W 80CRI 3000K-6000K for Indoor Lighting \u0026 Commercial Fixtures","description":"\u003ch1\u003e3W 5W 7W COB LED Chip Surface Light Source with 120LM\/W Efficacy and Gold Wire Construction\u003c\/h1\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"3W COB LED chip surface light source gold wire heavy gold aluminium substrate 50x7mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/5823\/2025-10-27\/original-image\/32662741-a5ef-4a4b-9ac9-183c659189c3.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThese COB (Chip on Board) LED lamp beads offer a compact, high-efficiency lighting solution for commercial and residential fixture manufacturers, lighting technicians, and electronics hobbyists. With a luminous efficacy of 120 lumens per watt and a colour rendering index of 80, these chips deliver bright, colour-consistent light suitable for downlights, spotlights, track lighting, and retrofit modules. The 120-degree beam angle ensures even light spread, reducing the need for multiple sources. Available in 3W, 5W, and 7W power ratings with your choice of warm white, neutral white, or daylight white colour temperatures, these surface-mount components are versatile for various design requirements.\u003c\/p\u003e\u003ch2\u003eFeatures and Construction Details\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"3W COB LED chip surface light source gold wire heavy gold aluminium substrate 50x7mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/5823\/2025-10-27\/original-image\/35dbf363-0ff2-4b8e-a0a3-3ef4fcfb2c00.webp\"\u003e\u003c\/div\u003e\u003cp\u003eEach COB LED chip is engineered for reliable performance in demanding lighting applications. Construction choices including gold wire bonding and a heavy gold aluminium substrate support heat dissipation and electrical stability.\u003c\/p\u003e\u003ch3\u003eMaterial and Build\u003c\/h3\u003e\u003cp\u003eThe chip uses gold wire for internal connections, providing consistent electrical paths. The substrate is heavy gold aluminium, which helps draw heat away from the LED junction. This combination is common in high-power COB designs where thermal management is critical to maintaining light output and lifespan.\u003c\/p\u003e\u003ch3\u003eSize and Practical Fit\u003c\/h3\u003e\u003cp\u003eThe overall dimensions are 50 by 7 millimetres, with a luminous surface area of 28 by 6 millimetres. This compact form factor integrates easily into standard reflector housings or custom PCB layouts. The chip thickness is minimal, allowing for low-profile fixture designs without compromising light output.\u003c\/p\u003e\u003ch3\u003eElectrical and Optical Specifications\u003c\/h3\u003e\u003cp\u003eForward and backward voltage range is 9 to 11 volts. Rated current is 300mA. The colour tolerance is restricted to 5 SDCN, meaning colour consistency across chips is tight. Luminous flux is rated at 120 lumens per watt. Thermal resistance is ≤5°C\/W, and the maximum allowable junction temperature is 150°C.\u003c\/p\u003e\u003ch2\u003eUses and Placement\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"3W COB LED chip surface light source gold wire heavy gold aluminium substrate 50x7mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/5823\/2025-10-27\/original-image\/5793996a-8e12-4640-b8c7-a3de263b15f9.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThese COB LED chips are designed for integration into indoor lighting fixtures where high efficiency and good colour rendering are needed. The range of power and colour temperature options makes them suitable for both accent and general lighting.\u003c\/p\u003e\u003ch3\u003eCommercial Lighting Fixtures\u003c\/h3\u003e\u003cp\u003eUse in downlights, spotlights, and track lighting heads for retail displays, offices, or hospitality spaces. The 80 CRI provides natural colour rendition for merchandise or decor. The 120-degree beam angle covers wide areas without harsh shadows.\u003c\/p\u003e\u003ch3\u003eResidential and DIY Projects\u003c\/h3\u003e\u003cp\u003eIdeal for custom lamps, under-cabinet lighting, or retrofit upgrades. Choose the 3W version for low-level task lighting, the 5W for general room light, or the 7W for brighter areas like kitchens or workshops.\u003c\/p\u003e\u003ch3\u003ePrototype and Low-Volume Manufacturing\u003c\/h3\u003e\u003cp\u003eWith selectable quantity options (1, 5, or 10 units per order), these chips are suitable for prototyping and small-scale production runs. The standardised form factor simplifies mounting into existing designs.\u003c\/p\u003e\u003ch2\u003eBenefits and Buying Value\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"3W COB LED chip surface light source gold wire heavy gold aluminium substrate 50x7mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/5823\/2025-10-27\/original-image\/76ab22b9-6d2c-44fe-b2e3-14deb4f16515.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThese COB LED chips offer measurable performance specifications that contribute to efficient, reliable lighting. The combination of efficacy, thermal design, and colour consistency provides practical value for both professionals and hobbyists.\u003c\/p\u003e\u003ch3\u003eEfficiency and Long-Term Operation\u003c\/h3\u003e\u003cp\u003eWith 120 lumens per watt, these chips convert more electricity into visible light, reducing energy consumption compared to older LED or halogen sources. The 80 CRI rating ensures that colours appear natural, which is important in retail or design environments.\u003c\/p\u003e\u003ch3\u003eThermal Performance and Reliability\u003c\/h3\u003e\u003cp\u003eThe heavy gold aluminium substrate aids in heat dissipation, helping to keep the junction temperature within safe limits. A thermal resistance of ≤5°C\/W and a maximum junction temperature of 150°C allow the chip to operate reliably under standard conditions. The product has undergone 1000-hour regular ageing testing with 85% performance retention.\u003c\/p\u003e\u003ch3\u003ePracticality and Versatility\u003c\/h3\u003e\u003cp\u003eMultiple power options and colour temperatures in the same footprint reduce your need to redesign fixtures for different applications. The gold wire construction provides consistent electrical performance. The wide 120-degree beam angle simplifies optical design, often requiring no secondary lens for uniform spread.\u003c\/p\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"3W COB LED chip surface light source gold wire heavy gold aluminium substrate 50x7mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/5823\/2025-10-27\/original-image\/79659354-0c91-4870-80f8-9ee4fbfef009.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"3W COB LED chip surface light source gold wire heavy gold aluminium substrate 50x7mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/5823\/2025-10-27\/original-image\/ba23cec9-8295-4a20-b627-c4485c5549f4.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"3W COB LED chip surface light source gold wire heavy gold aluminium substrate 50x7mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/5823\/2025-10-27\/original-image\/be277f5e-68e2-4bba-95c1-f9f1561c6b5c.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"3W COB LED chip surface light source gold wire heavy gold aluminium substrate 50x7mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/5823\/2025-10-27\/original-image\/c71cc381-c7a7-4e3a-a7bc-f1ee2ccef36d.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"3W COB LED chip surface light source gold wire heavy gold aluminium substrate 50x7mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/5823\/2025-10-27\/original-image\/e74a960b-5479-452f-b72c-d9e3b974f64d.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"3W COB LED chip surface light source gold wire heavy gold aluminium substrate 50x7mm\" 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