{"title":"Brake Bulbs","description":"","products":[{"product_id":"classic-382-12v-21w-single-filament-bulb","title":"382 Bulb 12V 21W P21W - Brake Reverse Indicator Bulb BA15s - Classic","description":"\u003cdiv style=\"max-width: 900px; margin: 0 auto; font-family: 'Times New Roman', serif; border: 1px solid #ddd; padding: 20px;\" class=\"product-wrapper\"\u003e\n\u003cdiv style=\"text-align: center; margin-bottom: 20px;\"\u003e\u003cimg style=\"max-width: 200px;\" alt=\"GT Motors\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0834\/9981\/1151\/files\/white_back.png?v=1769094837\"\u003e\u003c\/div\u003e\n\u003ch2 style=\"color: #cf2222; font-size: 24px; border-bottom: 2px solid #cf2222; padding-bottom: 10px; margin-bottom: 20px;\"\u003eClassic 382 12V 21W Bulb (P21W)\u003c\/h2\u003e\n\u003cdiv style=\"font-size: 12pt; line-height: 1.6;\"\u003e\n\u003cp\u003e\u003cstrong\u003eStandard single-filament automotive bulb with BA15s bayonet base, designed for brake lights, reversing lights, indicators, and rear fog lights.\u003c\/strong\u003e \u003cbr\u003eThe Classic 382 bulb (also known as P21W) features a single-contact bayonet fitting with straight pins for secure installation. Delivering approximately 460-550 lumens, this E-marked bulb is road legal for UK and European vehicles. Suitable for cars and commercial vehicles requiring robust, high-vibration-resistant lighting.\u003c\/p\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle Filament Design:\u003c\/strong\u003e 21W power for bright, consistent light output across multiple applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBA15s Bayonet Base:\u003c\/strong\u003e 15mm diameter with single center contact and straight\/opposite pins\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Output:\u003c\/strong\u003e Approximately 460-550 lumens for excellent visibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust Construction:\u003c\/strong\u003e High vibration resistance suitable for commercial vehicles and demanding conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoad Legal:\u003c\/strong\u003e E-marked for UK and European compliance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug and Play:\u003c\/strong\u003e Direct replacement, standard installation with no modifications required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Purpose:\u003c\/strong\u003e Suitable for brake, reverse, indicator, fog, and DRL applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-bottom: 20px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBulb Reference\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e382 (P21W \/ BA15s \/ 7506)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eWattage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e21W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBase Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eBA15s (15mm bayonet, single contact)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003ePin Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eStraight\/Opposite Pins (same height)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBulb Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eHalogen, Single Filament\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eLuminous Flux\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eApproximately 460-550 lumens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eLight Colour\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eClear (White Light)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eApprox. 47-52.5mm length × 25-26.5mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eAverage Lifespan\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eApproximately 250-500 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eHard glass, metal base\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eApproval\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eE-marked, Road Legal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003ePack Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eSingle Bulb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\"\u003eApplication \u0026amp; Usage Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Applications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003eBrake lights \/ Stop lights\u003c\/li\u003e\n\u003cli\u003eReversing lights \/ Backup lights\u003c\/li\u003e\n\u003cli\u003eIndicator lights \/ Turn signals (clear version)\u003c\/li\u003e\n\u003cli\u003eRear fog lights\u003c\/li\u003e\n\u003cli\u003eDaytime running lights (DRL)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAlso Known As:\u003c\/strong\u003e P21W, BA15s, 7506, LLB382\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBA15s vs BAY15d:\u003c\/strong\u003e The 382 (P21W) uses a BA15s base with a single contact point and is a single-filament bulb. This differs from the BAY15d base (used in 380 P21\/5W bulbs) which has dual contacts for dual-filament operation. Always verify which base type your vehicle requires.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation:\u003c\/strong\u003e Align the straight pins on the BA15s base with the socket slots, insert the bulb, and twist clockwise to lock in place. The bayonet design ensures secure fitment. Always ensure the ignition is off before replacing bulbs and replace in pairs for consistent appearance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Suitable for most cars and commercial vehicles with 12V DC electrical systems requiring P21W bulbs with BA15s single-contact base. Check your vehicle handbook or existing bulb to confirm 382\/P21W fitment before purchase.\u003c\/p\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\"\u003eImportant Safety \u0026amp; Compatibility Information\u003c\/h3\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003eAlways verify bulb type in your vehicle handbook before purchasing\u003c\/li\u003e\n\u003cli\u003eSwitch off ignition and allow bulbs to cool before handling\u003c\/li\u003e\n\u003cli\u003eDo not touch glass with bare hands; use a clean cloth to avoid oil contamination\u003c\/li\u003e\n\u003cli\u003eEnsure bulb is correctly seated and twisted to lock in socket\u003c\/li\u003e\n\u003cli\u003eReplace bulbs in pairs for consistent light output and appearance\u003c\/li\u003e\n\u003cli\u003eFor indicator use, amber versions (\u003ca href=\"https:\/\/gtmotorpart.co.uk\/products\/classic-382-12v-21w-single-filament-amber-bulb\" title=\"Indicator Light Bulb 581 Bulb 12V 21W Amber PY21W - BAU15s\"\u003e581 PY21W\u003c\/a\u003e) are available separately\u003c\/li\u003e\n\u003cli\u003eHard glass construction provides durability but handle with care\u003c\/li\u003e\n\u003cli\u003eDispose of used bulbs responsibly at household waste recycling centres\u003c\/li\u003e\n\u003cli\u003eKeep out of reach of children\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 30px; margin-bottom: 15px;\"\u003eSHIPPING \u0026amp; RETURNS\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003eFast UK delivery available\u003c\/li\u003e\n\u003cli\u003eLocal collection option at checkout\u003c\/li\u003e\n\u003cli\u003eOrders dispatched within 1-2 working days\u003c\/li\u003e\n\u003cli\u003eTracked shipping on all orders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eReturns:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003e14-day return policy on unopened products\u003c\/li\u003e\n\u003cli\u003eItems must be unused and in original packaging\u003c\/li\u003e\n\u003cli\u003eContact gtmotorspart@outlook.com for return authorization\u003c\/li\u003e\n\u003cli\u003eOpened bulbs are non-returnable for safety and hygiene reasons\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 30px; margin-bottom: 15px;\"\u003eWHY CHOOSE US\u003c\/h3\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrusted Quality:\u003c\/strong\u003e Genuine OEM-approved parts and premium fluids from authorized suppliers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompetitive Pricing:\u003c\/strong\u003e Best value on premium automotive oils and maintenance products\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Local Delivery \u0026amp; Collection:\u003c\/strong\u003e Quick dispatch with flexible delivery and collection options across the UK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFriendly Support:\u003c\/strong\u003e Expert advice and customer service from automotive specialists\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n.product-wrapper h2, .product-wrapper h3 {\n  font-family: Arial, sans-serif;\n}\n.product-wrapper ul {\n  list-style-type: disc;\n}\n.product-wrapper table {\n  font-size: 11pt;\n}\n@media (max-width: 768px) {\n  .product-wrapper {\n    padding: 10px;\n  }\n  .product-wrapper h2 {\n    font-size: 20px;\n  }\n  .product-wrapper h3 {\n    font-size: 16px;\n  }\n}\n\u003c\/style\u003e","brand":"Classic","offers":[{"title":"Default Title","offer_id":56230324633935,"sku":null,"price":1.09,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0834\/9981\/1151\/files\/classic-382-21w-bulb.jpg?v=1770928275"},{"product_id":"classic-380-12v-21-5w-double-filament-bulb","title":"380 Bulb 12V 21\/5W P21\/5W - Brake Tail Light Bulb BAY15d - Classic","description":"\u003cdiv class=\"product-wrapper\" style=\"max-width: 900px; margin: 0 auto; font-family: 'Times New Roman', serif; border: 1px solid #ddd; padding: 20px;\"\u003e\n\u003cdiv style=\"text-align: center; margin-bottom: 20px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0834\/9981\/1151\/files\/white_back.png?v=1769094837\" alt=\"GT Motors\" style=\"max-width: 200px;\"\u003e\u003c\/div\u003e\n\u003ch2 style=\"color: #cf2222; font-size: 24px; border-bottom: 2px solid #cf2222; padding-bottom: 10px; margin-bottom: 20px;\"\u003eClassic 380 12V 21\/5W Bulb P21\/5W\u003c\/h2\u003e\n\u003cdiv style=\"font-size: 12pt; line-height: 1.6;\"\u003e\n\u003cp\u003e\u003cstrong\u003eStandard dual-filament automotive bulb with bayonet-fit BAY15d base, designed for stop\/tail and brake\/side light applications.\u003c\/strong\u003e The Classic 380 bulb (also known as P21\/5W) operates at 12 volts with 21W for bright brake lights and 5W for rear running lights. E-marked and ECE Regulation 37 approved for road-legal use in UK and European vehicles. Suitable for cars and motorcycles requiring dual-intensity rear lighting.\u003c\/p\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Filament Design:\u003c\/strong\u003e One bulb handles both parking (5W) and braking (21W) intensities\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBAY15d Bayonet Base:\u003c\/strong\u003e Double contact, offset pins for secure twist-and-lock installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Output:\u003c\/strong\u003e 460 lumens (21W) for brake lights, 40 lumens (5W) for tail lights\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Vibration Resistance:\u003c\/strong\u003e Designed to withstand automotive and motorcycle vibration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoad Legal:\u003c\/strong\u003e E-marked and ECE Regulation 37 approved for UK and European compliance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOriginal Quality:\u003c\/strong\u003e Reliable halogen technology for consistent dual-intensity performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Suitable for many car and motorcycle models with BAY15d sockets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-bottom: 20px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBulb Reference\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e380 (P21\/5W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eWattage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e21W \/ 5W (Dual Filament)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBase Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eBAY15d (Double contact, offset pins)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBulb Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eHalogen, Dual Filament\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eLuminous Flux\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eApprox. 460 lm (21W) \/ 40 lm (5W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eColour\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eIncandescent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eApprox. 48-50mm length × 25mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eApproval\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eE-marked, ECE Regulation 37, Road Legal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003ePack Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eSingle Bulb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\"\u003eApplication \u0026amp; Usage Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003ePrimary Applications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003eBrake lights \/ Stop lights (21W filament)\u003c\/li\u003e\n\u003cli\u003eTail lights \/ Rear position lights (5W filament)\u003c\/li\u003e\n\u003cli\u003eRear side lights (5W filament)\u003c\/li\u003e\n\u003cli\u003eCombined brake\/tail light clusters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAlso Known As:\u003c\/strong\u003e P21\/5W, BAY15d bulb, 380 brake\/tail bulb\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow Dual Filament Works:\u003c\/strong\u003e The 380 bulb contains two separate filaments within one glass envelope. The 5W filament illuminates when your sidelights or headlights are on (providing rear position lighting), while the brighter 21W filament activates when you press the brake pedal. This dual functionality saves space and simplifies vehicle wiring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation:\u003c\/strong\u003e Align the offset pins on the BAY15d base with the socket slots, insert the bulb, and twist clockwise to lock in place. The offset pin design ensures correct orientation. Always ensure the ignition is off before replacing bulbs and replace in pairs for consistent appearance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Suitable for most cars and motorcycles with 12V DC electrical systems requiring P21\/5W bulbs with BAY15d double-contact base. Check your vehicle handbook or existing bulb to confirm 380\/P21\/5W fitment before purchase.\u003c\/p\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\"\u003eImportant Safety \u0026amp; Compatibility Information\u003c\/h3\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003eAlways verify bulb type in your vehicle handbook before purchasing\u003c\/li\u003e\n\u003cli\u003eSwitch off ignition and allow bulbs to cool before handling\u003c\/li\u003e\n\u003cli\u003eDo not touch glass with bare hands; use a clean cloth to avoid oil contamination\u003c\/li\u003e\n\u003cli\u003eEnsure bulb is correctly seated and twisted to lock in socket\u003c\/li\u003e\n\u003cli\u003eReplace brake\/tail bulbs in pairs for consistent light output and appearance\u003c\/li\u003e\n\u003cli\u003eTest both filaments after installation (sidelights and brake lights)\u003c\/li\u003e\n\u003cli\u003eThe offset-pin design ensures correct installation orientation\u003c\/li\u003e\n\u003cli\u003eDispose of used bulbs responsibly at household waste recycling centres\u003c\/li\u003e\n\u003cli\u003eKeep out of reach of children\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 30px; margin-bottom: 15px;\"\u003eSHIPPING \u0026amp; RETURNS\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003eFast UK delivery available\u003c\/li\u003e\n\u003cli\u003eLocal collection option at checkout\u003c\/li\u003e\n\u003cli\u003eOrders dispatched within 1-2 working days\u003c\/li\u003e\n\u003cli\u003eTracked shipping on all orders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eReturns:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003e14-day return policy on unopened products\u003c\/li\u003e\n\u003cli\u003eItems must be unused and in original packaging\u003c\/li\u003e\n\u003cli\u003eContact gtmotorspart@outlook.com for return authorization\u003c\/li\u003e\n\u003cli\u003eOpened bulbs are non-returnable for safety and hygiene reasons\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 30px; margin-bottom: 15px;\"\u003eWHY CHOOSE US\u003c\/h3\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrusted Quality:\u003c\/strong\u003e Genuine OEM-approved parts and premium fluids from authorized suppliers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompetitive Pricing:\u003c\/strong\u003e Best value on premium automotive oils and maintenance products\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Local Delivery \u0026amp; Collection:\u003c\/strong\u003e Quick dispatch with flexible delivery and collection options across the UK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFriendly Support:\u003c\/strong\u003e Expert advice and customer service from automotive specialists\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n.product-wrapper h2, .product-wrapper h3 {\n  font-family: Arial, sans-serif;\n}\n.product-wrapper ul {\n  list-style-type: disc;\n}\n.product-wrapper table {\n  font-size: 11pt;\n}\n@media (max-width: 768px) {\n  .product-wrapper {\n    padding: 10px;\n  }\n  .product-wrapper h2 {\n    font-size: 20px;\n  }\n  .product-wrapper h3 {\n    font-size: 16px;\n  }\n}\n\u003c\/style\u003e","brand":"Classic","offers":[{"title":"Default Title","offer_id":56230335578447,"sku":null,"price":1.09,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0834\/9981\/1151\/files\/002_bb649465-426d-4c8c-9a2a-9e35524194f5.webp?v=1770928279"},{"product_id":"classic-582-12v-21w-bulb","title":"582 Bulb 12V 21W W21W - Brake Indicator Reverse Light Bulb - Classic","description":"\u003cdiv style=\"max-width: 900px; margin: 0 auto; font-family: 'Times New Roman', serif; border: 1px solid #ddd; padding: 20px;\" class=\"product-wrapper\"\u003e\n\u003cdiv style=\"text-align: center; margin-bottom: 20px;\"\u003e\u003cimg style=\"max-width: 200px;\" alt=\"GT Motors\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0834\/9981\/1151\/files\/white_back.png?v=1769094837\"\u003e\u003c\/div\u003e\n\u003ch2 style=\"color: rgb(207, 34, 34); font-size: 24px; border-bottom: 2px solid rgb(207, 34, 34); padding-bottom: 10px; margin-bottom: 20px; text-align: center;\"\u003eClassic 582 12V 21W Bulb (W21W)\u003c\/h2\u003e\n\u003cdiv style=\"font-size: 12pt; line-height: 1.6;\"\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-quality 12-volt, 21-watt incandescent automotive bulb for brake lights, indicators, reverse lights, and rear fog lights.\u003c\/strong\u003e \u003cbr\u003eThe Classic 582 bulb (also known as W21W) features a capless wedge design with W3x16d base, delivering reliable 460-lumen output for essential exterior lighting applications. E-marked and road legal for UK and European vehicles.\u003c\/p\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapless Wedge Design:\u003c\/strong\u003e W3x16d base plugs directly into socket for quick, tool-free installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Output:\u003c\/strong\u003e 21W power delivers approximately 460 lumens for bright, visible signaling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Purpose Application:\u003c\/strong\u003e Suitable for brake lights, indicators, reverse lights, and rear fog lights\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoad Legal:\u003c\/strong\u003e E-marked approval for UK and European compliance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle Filament:\u003c\/strong\u003e Reliable incandescent technology for consistent performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Clear Glass:\u003c\/strong\u003e Provides bright white light output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12V DC Compatible:\u003c\/strong\u003e Designed for standard automotive electrical systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-bottom: 20px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBulb Reference\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e582 (W21W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eWattage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e21W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBase Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eW3x16d (Wedge Base \/ Capless)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBulb Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eIncandescent, Single Filament\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBrightness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eApproximately 460 lumens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eColour\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eClear (Standard White Light)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eApprox. 4.0 cm height × 2.0 cm width\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eApproval\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eE-marked, Road Legal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003ePack Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eSingle Bulb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\"\u003eApplication \u0026amp; Usage Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Applications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003eBrake lights (stop lights)\u003c\/li\u003e\n\u003cli\u003eRear indicator lights (turn signals)\u003c\/li\u003e\n\u003cli\u003eReverse lights (backup lights)\u003c\/li\u003e\n\u003cli\u003eRear fog lights\u003c\/li\u003e\n\u003cli\u003eTail lights (on some vehicles)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAlso Known As:\u003c\/strong\u003e W21W, T20 bulb (in some markets)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation:\u003c\/strong\u003e The capless wedge design allows for simple push-fit installation directly into the bulb socket. No tools required. Always ensure the ignition is off before replacing bulbs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Suitable for most 12V DC automotive electrical systems. Check your vehicle handbook or existing bulb to confirm 582\/W21W fitment before purchase.\u003c\/p\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 25px; margin-bottom: 15px;\"\u003eImportant Safety \u0026amp; Compatibility Information\u003c\/h3\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003eAlways verify bulb type in your vehicle handbook before purchasing\u003c\/li\u003e\n\u003cli\u003eSwitch off ignition and allow bulbs to cool before handling\u003c\/li\u003e\n\u003cli\u003eDo not touch glass with bare hands; use a clean cloth to avoid oil contamination\u003c\/li\u003e\n\u003cli\u003eEnsure bulb is correctly seated in socket to prevent moisture ingress\u003c\/li\u003e\n\u003cli\u003eReplace bulbs in pairs for consistent light output and appearance\u003c\/li\u003e\n\u003cli\u003eDispose of used bulbs responsibly at household waste recycling centres\u003c\/li\u003e\n\u003cli\u003eKeep out of reach of children\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 30px; margin-bottom: 15px;\"\u003eSHIPPING \u0026amp; RETURNS\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003eFast UK delivery available\u003c\/li\u003e\n\u003cli\u003eLocal collection option at checkout\u003c\/li\u003e\n\u003cli\u003eOrders dispatched within 1-2 working days\u003c\/li\u003e\n\u003cli\u003eTracked shipping on all orders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eReturns:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003e14-day return policy on unopened products\u003c\/li\u003e\n\u003cli\u003eItems must be unused and in original packaging\u003c\/li\u003e\n\u003cli\u003eContact gtmotorspart@outlook.com for return authorization\u003c\/li\u003e\n\u003cli\u003eOpened bulbs are non-returnable for safety and hygiene reasons\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #cf2222; font-size: 18px; margin-top: 30px; margin-bottom: 15px;\"\u003eWHY CHOOSE US\u003c\/h3\u003e\n\u003cul style=\"margin-left: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrusted Quality:\u003c\/strong\u003e Genuine OEM-approved parts and premium fluids from authorized suppliers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompetitive Pricing:\u003c\/strong\u003e Best value on premium automotive oils and maintenance products\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Local Delivery \u0026amp; Collection:\u003c\/strong\u003e Quick dispatch with flexible delivery and collection options across the UK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFriendly Support:\u003c\/strong\u003e Expert advice and customer service from automotive specialists\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n.product-wrapper h2, .product-wrapper h3 {\n  font-family: Arial, sans-serif;\n}\n.product-wrapper ul {\n  list-style-type: disc;\n}\n.product-wrapper table {\n  font-size: 11pt;\n}\n@media (max-width: 768px) {\n  .product-wrapper {\n    padding: 10px;\n  }\n  .product-wrapper h2 {\n    font-size: 20px;\n  }\n  .product-wrapper h3 {\n    font-size: 16px;\n  }\n}\n\u003c\/style\u003e","brand":"Classic","offers":[{"title":"Default Title","offer_id":56243895894351,"sku":null,"price":1.09,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0834\/9981\/1151\/files\/classic-582-bulb.webp?v=1770928290"}],"url":"https:\/\/gtmotorpart.co.uk\/collections\/brake-bulbs.oembed","provider":"GT Motor Part","version":"1.0","type":"link"}