{"product_id":"auxbeam-b21-series-3157-switchback-led-bulbs-canbus-dual-color-white-amber-600-bright","title":"Auxbeam B21 Series 3157 Switchback LED Bulbs – CANBUS, Dual-Color White\/Amber, 600% Bright","description":"\u003ch2\u003eMeet the Auxbeam B21 Series 3157 Switchback LEDs\u003c\/h2\u003e\n\u003cp\u003eDual-color illumination blends cool white DRL with amber turn signals in a single, compact bulb. With a built-in CANBUS system, these bulbs are designed to minimize decoding issues across many standard sockets. Note: not suitable for Toyota Tundra or Tacoma; for some sensitive models (like certain Silverado, RAM, and Ford trucks) you may need additional resistors.\u003c\/p\u003e\n\u003ch3\u003eWhat makes them stand out\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-color operation:\u003c\/strong\u003e White for parking\/DRL and amber for signaling, with a distinct amber-off-amber-off sequence for visibility.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh brightness and quick response:\u003c\/strong\u003e 28W per bulb delivering up to 6500K cool white or 3500K amber light, with instant-on performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCANBUS error-free:\u003c\/strong\u003e Built-in resistor helps reduce decoding warnings and hyper-flash on standard sockets.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e360° illumination:\u003c\/strong\u003e A full halo of light with no dark spots.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdvanced cooling for longevity:\u003c\/strong\u003e 12,000 RPM silent fan, copper ring, 16 heat sinks, and 6063 aluminum housing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurability and weather resistance:\u003c\/strong\u003e IP68-rated waterproof and dustproof construction.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEngineering for real-world use\u003c\/h3\u003e\n\u003cp\u003eDesigned for replacement on US-standard sockets such as 3157, 3157A, 3057, 3457, 4157 and more. The bulbs are polarity sensitive; if they don’t light, try flipping the plug. They are a plug-and-play solution—no drilling or wiring required in typical installations.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLong-lasting lighting:\u003c\/strong\u003e The robust cooling system helps extend life up to an estimated 60,000 hours.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReliable in diverse conditions:\u003c\/strong\u003e IP68 rating protects against water and dust in driving rain or dusty roads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePractical benefits you might notice\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBetter signaling visibility from a distance during daytime and night driving.\u003c\/li\u003e\n  \u003cli\u003eClean, modern aesthetic with dual white\/amber states for DRL and turn signals.\u003c\/li\u003e\n  \u003cli\u003eConsistent performance across a wide range of vehicles using standard sockets.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAs you shop, keep in mind compatibility notes and installation tips. If you have questions about fitment for your vehicle, our support team can help you explore options and potential resistors when needed.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What are the key benefits of the Auxbeam B21 3157 Switchback bulbs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Dual-color white DRL and amber turn signals, CANBUS compatibility, and strong brightness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How do I know if these bulbs fit my vehicle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Designed for US sockets like 3157\/3157A\/3057; check fitment notes and consider resistors for sensitive models.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Auxbeam","offers":[{"title":"Default Title","offer_id":42492739878997,"sku":"B0BZ45WLRZ","price":56.37,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/auxbeam-b21-3157-switchback-white-amber.jpg?v=1778603736","url":"https:\/\/plentytorque.co.uk\/products\/auxbeam-b21-series-3157-switchback-led-bulbs-canbus-dual-color-white-amber-600-bright","provider":"PlentyTorque","version":"1.0","type":"link"}