{"product_id":"serfas-thunderbolt-usb-taillight-black","title":"Serfas Thunderbolt USB Taillight Black — 35 Lumens, 30-LED Strip, USB Rechargeable","description":"\u003cp\u003e\u003cstrong\u003eThe Serfas Thunderbolt USB Taillight is a compact, USB-rechargeable rear bike light that delivers 35 lumens from a 30-LED strip for bright visibility and multiple mounting options.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Thunderbolt combines a slim, water-resistant silicone body with a rechargeable Lithium Polymer battery so you can ditch disposable cells while keeping a bold rear silhouette on the road. Designed for commuters and recreational riders who want a reliable, economical taillight, it balances brightness, runtime, and simple charging. Its 30 micro-LED array creates a continuous red band that reads clearly to drivers and cyclists, and the light offers selectable steady and flashing modes to match riding conditions.\u003c\/p\u003e\n\n\u003ch3\u003eHow bright is this taillight and what makes it stand out?\u003c\/h3\u003e\n\u003cp\u003eThe Thunderbolt produces 35 lumens focused through 30 micro-LEDs, creating a vivid rear-facing strip that improves visibility in traffic and low-light rides. The combination of efficient LEDs and a clear lens improves contrast and perception at distance without a bulky housing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOutput: 35 lumens of red light.\u003c\/li\u003e\n  \u003cli\u003e30-mini LED strip for a wide, recognizable profile.\u003c\/li\u003e\n  \u003cli\u003eHigh-quality lens enhances brightness and clarity.\u003c\/li\u003e\n  \u003cli\u003eCompact form factor keeps weight and bulk low.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the run times and charging details I should expect?\u003c\/h3\u003e\n\u003cp\u003eThe Thunderbolt runs through several power modes to match visibility needs and preserve battery life. A full USB charge takes about 3.5 hours and the internal Lithium Polymer battery powers different modes with predictable runtimes for planning rides.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCharging: USB rechargeable, full charge ≈ 3.5 hours.\u003c\/li\u003e\n  \u003cli\u003eRun times: Steady High ~1.75 hours; Steady Low ~7 hours.\u003c\/li\u003e\n  \u003cli\u003eFlash modes: High Blink ~3 hours; Low Blink ~9.5 hours.\u003c\/li\u003e\n  \u003cli\u003eRechargeable LiPo removes need for disposable batteries.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the Thunderbolt mount and hold up in real-world conditions?\u003c\/h3\u003e\n\u003cp\u003eSerfas engineered the Thunderbolt with a flexible, water-resistant silicone body and several rear-facing mounting options, so it adapts to seatposts, racks, and many saddle rails. The silicone exterior cushions the light and helps maintain a secure fit even on bumpy roads or in wet weather.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWater-resistant silicone housing for wet-weather reliability.\u003c\/li\u003e\n  \u003cli\u003eMultiple mounting choices fit a range of bike frames and accessories.\u003c\/li\u003e\n  \u003cli\u003eLow weight and compact size make it easy to move between bikes.\u003c\/li\u003e\n  \u003cli\u003eDurable construction resists impacts and road vibration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich modes should I use for commuting versus long evening rides?\u003c\/h3\u003e\n\u003cp\u003eSelect modes based on visibility needs and battery management: steady high for short urban rides where maximum visibility is essential, and flashing low for longer rides where conserving battery matters. Flash patterns increase attention from motorists while steady modes provide continuous presence.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse Steady High for short, high-traffic urban segments.\u003c\/li\u003e\n  \u003cli\u003eChoose Low Blink for extended rides to maximize run time.\u003c\/li\u003e\n  \u003cli\u003eHigh Blink balances visibility and moderate runtime for mixed conditions.\u003c\/li\u003e\n  \u003cli\u003eSwitch modes quickly to adapt to changing light and traffic.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Serfas Thunderbolt is aimed at daily commuters, evening recreational riders, and anyone who wants an affordable, easy-to-use rechargeable taillight. It’s a practical upgrade for riders replacing disposables, those needing a compact backup light, or cyclists who want a clear, high-contrast rear profile without adding bulk. If you value quick USB charging, dependable runtimes, and flexible mounting, the Thunderbolt is a solid, budget-friendly option.\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: How long does the Thunderbolt take to fully charge?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: A full USB charge takes about 3.5 hours.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What are the main runtime modes?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Steady High 1.75h, Steady Low 7h, High Blink 3h, Low Blink 9.5h.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Serfas","offers":[{"title":"Default Title","offer_id":48024461148321,"sku":"B009WGFYRC","price":97.16,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/6532\/5729\/files\/serfas-thunderbolt-front-view.jpg?v=1791358206","url":"https:\/\/canadiansporting.ca\/products\/serfas-thunderbolt-usb-taillight-black","provider":"Canadian Sporting","version":"1.0","type":"link"}