{"product_id":"alla-lighting-t25-3157-3457-switchback-led-bulbs-6000k-white-amber-28-smd-high-output-plug-and-play","title":"Alla Lighting T25 (3157\/3457) Switchback LED Bulbs 6000K White \/ Amber - 28-SMD High Output, Plug-and-Play","description":"\u003cp\u003e\u003cstrong\u003eAlla Lighting T25 switchback LED bulbs deliver bright 6000K white for parking\/DRL and vivid amber for turn signals in a single 3157-style wedge.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese are a higher-output LED replacement designed to combine daytime running light or parking light function and amber signaling in one dual-filament T25 (3157\/3457-compatible) bulb. Each lamp uses 28 high-power 2835 SMD chips to increase on-road visibility while keeping the compact wedge footprint and plug-and-play form factor common to many cars and trucks. They operate on 12–18V systems and include a one-year manufacturer's warranty.\u003c\/p\u003e\n\n\u003ch3\u003eHow bright and visible are these switchback LEDs?\u003c\/h3\u003e\n\u003cp\u003eBrightness is stepped up by the dense 28-piece 2835 SMD array, giving a crisp xenon-white for DRL\/parking and a saturated amber for turn signaling. The bulbs are tuned to be highly conspicuous in daylight and nighttime conditions without requiring major housing changes.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e28 high-efficiency 2835 SMD chips per bulb for strong output\u003c\/li\u003e\n  \u003cli\u003e6000K xenon-white for parking\/DRL clarity\u003c\/li\u003e\n  \u003cli\u003ePure amber\/yellow for turn indication to meet visual contrast needs\u003c\/li\u003e\n  \u003cli\u003eWorks on standard 12–18V automotive electrical systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these fit my vehicle and replace my 3157\/3457 bulbs?\u003c\/h3\u003e\n\u003cp\u003eThey are built in the common T25 wedge shape and are compatible with many 3157\/3457-style sockets. The listing covers a wide range of cross-references; verify socket type and dual-function arrangement (parking\/DRL + turn signal on same bulb) before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect fit for many 3157, 3457, 4057, 4157 and similar T25 wedge sockets\u003c\/li\u003e\n  \u003cli\u003eDimension: approximately 0.71 in diameter × 2.50 in length\u003c\/li\u003e\n  \u003cli\u003eRequires the original bulb location to support combined parking\/turn function\u003c\/li\u003e\n  \u003cli\u003eCheck application guides or your owner's manual for bulb type confirmation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDo I need extra hardware to prevent hyper-flash or error codes?\u003c\/h3\u003e\n\u003cp\u003eBecause these LEDs draw far less current than incandescent filaments, many vehicles will show fast-blink (hyper-flash) or a bulb-out warning without added load. Installing a specified load resistor resolves flash-rate and CAN-bus detection issues on most systems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRecommended: one 50W 6Ω load resistor per circuit to mimic incandescent draw\u003c\/li\u003e\n  \u003cli\u003eSome CAN-bus vehicles may still require an electronic Canceller or adapter\u003c\/li\u003e\n  \u003cli\u003eProfessional installation of resistors is advised to avoid wiring heat or connection problems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable are these LEDs and what warranty is included?\u003c\/h3\u003e\n\u003cp\u003eThe design focuses on longevity with modern 2835 SMD chips and automotive-grade construction. Alla Lighting backs these bulbs with a one-year warranty covering manufacturing defects under normal use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRugged SMD construction for long operating life\u003c\/li\u003e\n  \u003cli\u003eOperating voltage range: 12–18V DC suitable for most vehicles\u003c\/li\u003e\n  \u003cli\u003eOne-year limited warranty against defects\u003c\/li\u003e\n  \u003cli\u003eNot intended to alter sealed-lens housings or replace required external optics\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Alla Lighting T25 switchback LED set is intended for drivers who want a single-bulb solution to combine bright white parking\/DRL functionality with clear amber turn signaling, in vehicles that use dual-function 3157\/3457-style sockets. It suits enthusiasts upgrading visibility, fleet vehicles aiming for consistent light output, and owners replacing aging incandescent wedge bulbs—provided you can install or have installed the recommended load resistor where 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: Do these LEDs need a resistor to stop hyper-flash?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Most vehicles require a 50W 6Ω load resistor per circuit to prevent hyper-flash and avoid bulb-failure warnings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will these work in any 3157 or 3457 socket?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They fit T25\/3157-style sockets, but must be used where one bulb provides both DRL\/parking and turn functions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Alla Lighting","offers":[{"title":"Default Title","offer_id":55168294584663,"sku":"B019EYJU8A","price":42.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/alla-lighting-front-packaging-t25-dual-color.jpg?v=1790398599","url":"https:\/\/britishgarage.co.uk\/products\/alla-lighting-t25-3157-3457-switchback-led-bulbs-6000k-white-amber-28-smd-high-output-plug-and-play","provider":"British Garage","version":"1.0","type":"link"}