{"product_id":"auxbeam-b21-series-1157-switchback-led-bulbs-canbus-anti-hyper-flash-white-amber","title":"Auxbeam B21 Series 1157 Switchback LED Bulbs – CANBUS, Anti Hyper Flash, White \u0026 Amber","description":"\u003cdiv class='\\\"seo-desc\\\"'\u003e\n  \u003ch3\u003eOverview\u003c\/h3\u003e\n  \u003cp\u003eMeet the Auxbeam B21 Series 1157 Switchback LED Bulbs, a dual‑color lighting solution that blends bright white parking lights with amber turn signals in a single compact unit. Built with a CANBUS‑style driver, these bulbs are designed to reduce decoding issues on many vehicles, often without the need for extra resistors. The result is a clean, high‑contrast signal that’s easy to notice in daylight and at night.\u003c\/p\u003e\n  \u003cp\u003eWith a focus on visibility and ease of use, the B21 switches between white DRL and amber signaling without complicated wiring. The design aims for instant illumination when you switch modes, so you can rely on a crisp response during lane changes or signaling maneuvers.\u003c\/p\u003e\n\n  \u003ch3\u003eDual color function and visibility\u003c\/h3\u003e\n  \u003cp\u003eThe dual color setup lets you reuse a single bulb for both parking\/DRL lighting and turn signals. This separation between white and amber helps drivers and pedestrians identify your intentions from a distance, especially in bright conditions.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e6500K cool white DRL for daytime visibility\u003c\/li\u003e\n    \u003cli\u003e3500K amber turn signal for conspicuous signaling\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003ePerformance and longevity\u003c\/h3\u003e\n  \u003cp\u003eEach bulb packs 36 upgraded 3030 SMD chips, delivering strong brightness with an instant-on response. At about 28W per bulb, the system aims for a noticeable, immediate glow without warm-up delays, helping your signals stand out as you drive.\u003c\/p\u003e\n  \u003cp\u003eThe design provides a full 360° beam, reducing shadows and ensuring consistent illumination around the lamp housing.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eInstant-on brightness\u003c\/li\u003e\n    \u003cli\u003e360° full illumination without dark spots\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eDurability and cooling\u003c\/h3\u003e\n  \u003cp\u003eTo support long life, the B21 uses a four‑layer cooling system, including a 12,000 RPM silent fan, a copper cooling ring, multiple heat sinks, and a rugged aluminum body. The IP68 waterproof and dustproof rating adds resilience for daily driving in challenging conditions.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eIP68 waterproof and dustproof\u003c\/li\u003e\n    \u003cli\u003eLong lifespan up to 60,000 hours (typical)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eCompatibility and installation\u003c\/h3\u003e\n  \u003cp\u003eDesigned for US standard sockets (e.g., 1157, 2057, 2357 variants). The bulbs are polarity sensitive, so if they don’t light, try flipping the connector. Note that they are not compatible with certain models listed in the exclusions; in some cases, extra resistors may be required for highly sensitive systems.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003ePlug-and-play for most 1157\/2057 style sockets\u003c\/li\u003e\n    \u003cli\u003eNot compatible with all models; check the exclusions\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWarranty and support\u003c\/h3\u003e\n  \u003cp\u003eAuxbeam offers a 1-year warranty on these bulbs. If you have questions about compatibility or performance, our support team is ready to help with guidance and troubleshooting.\u003c\/p\u003e\n\u003c\/div\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: Is the Auxbeam B21 Series CANBUS-compatible and error-free?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. These bulbs are designed to minimize decoding issues on most vehicles without external resistors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are there exclusions I should know about before buying?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Some models are not supported (CK sockets, certain makes and years). See product notes for the full list.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Auxbeam","offers":[{"title":"Default Title","offer_id":42492741288021,"sku":"B0BZ44JCJL","price":56.37,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/auxbeam-b21-series-1157-switchback-led-bulbs-white-amber.jpg?v=1778603774","url":"https:\/\/plentytorque.co.uk\/products\/auxbeam-b21-series-1157-switchback-led-bulbs-canbus-anti-hyper-flash-white-amber","provider":"PlentyTorque","version":"1.0","type":"link"}