{"product_id":"heise-pro-series-led-bulbs-fits-d4s-d4r","title":"Heise Pro Series LED Bulbs - Fits D4S, D4R","description":"\u003cp\u003eThe \u003cstrong\u003eHeise Pro Series D4S \/ D4R LED Bulbs (HE-D4CPRO)\u003c\/strong\u003e light up the trail like daylight with a massive 16,000 lumens of crisp white light — dramatically outshining standard HID and halogen lighting — in a direct plug-and-play format compatible with both D4S and D4R sockets. Built for off-road enthusiasts and performance-minded drivers who want to upgrade aging HID systems, the D4 Pro Series combines an extreme LED chipset with an all-metal housing and a 2 mm solid copper thermodynamic core that keeps operating temps locked at just 46.1°C (115°F). Wide 12-24V input voltage compatibility makes these a versatile upgrade across a broad range of vehicles and applications.\u003c\/p\u003e\n\n\u003cp\u003eRunning at 70W per set, the D4 Pro's IC thermal controller pairs with a high-speed smart fan to actively pull heat away from the diodes — extending LED life and maintaining consistent output even under sustained use. The fully rotatable collar lets you fine-tune the beam pattern for perfect cutoff alignment in projector housings (the standard housing type for D4S \/ D4R applications), while built-in reverse polarity protection means you can't wire it wrong. The integrated EMI filter keeps your radio, GPS, and CB completely static-free. Backed by a 3-year limited warranty, this is the D4S \/ D4R LED upgrade that serious enthusiasts have been waiting for.\u003c\/p\u003e\n\n\u003cp\u003eThe D4 Pro Series is compatible with any vehicle running a D4S or D4R HID socket — a fitment found on a wide range of Japanese and European luxury vehicles, performance cars, and trucks equipped with factory HID projector headlights. Installation replaces the OEM HID bulb directly; in most cases the factory ballast is bypassed or removed. For vehicles with CANBUS systems, a CANBUS decoder may be required to prevent error codes. Intended for off-road use only.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose the Heise D4S \/ D4R Pro Series LED Bulbs?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e16,000-Lumen Output:\u003c\/strong\u003e Massively brighter than aging HID xenon output for dramatically improved night visibility on and off the trail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD4S \u0026amp; D4R Compatible:\u003c\/strong\u003e Single kit fits both D4S and D4R sockets — covers a wide range of factory HID projector headlight applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12-24V Input Voltage:\u003c\/strong\u003e Wide voltage range makes these compatible with both standard 12V automotive and 24V truck\/commercial applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 mm Solid Copper Thermodynamic Core:\u003c\/strong\u003e Efficiently pulls heat away from the LED chipset, extending bulb life and maintaining consistent output under sustained use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIC Thermal Controller + Smart Fan:\u003c\/strong\u003e Active cooling system keeps operating temps at just 46.1°C even during extended high-output use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotatable Collar:\u003c\/strong\u003e Dial in your exact beam pattern for proper cutoff alignment in D4S \/ D4R projector housings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-In EMI Filter:\u003c\/strong\u003e Eliminates radio static and interference — critical for vehicles running CB, ham radio, or GPS systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-Year Limited Warranty:\u003c\/strong\u003e Heise stands behind the D4 Pro Series with one of the strongest warranties in the LED headlight segment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation \u0026amp; Compatibility Recommendations\u003c\/h2\u003e\n\u003cp\u003eThe Heise D4S \/ D4R Pro Series installs directly into any D4S or D4R socket. In most applications, the factory HID ballast is bypassed or removed during installation — these are LED bulbs that do not require a ballast to operate. The rotatable collar should be adjusted after installation with the headlights aimed at a wall to confirm proper beam cutoff. For vehicles with CANBUS error detection (common on Japanese and European luxury vehicles), a CANBUS decoder is recommended to prevent flickering or error codes. Intended for off-road use only.\u003c\/p\u003e\n\n\u003ch2\u003eFull Specifications\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHeise LED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eHE-D4CPRO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBulb Fitment\u003c\/td\u003e\n\u003ctd\u003eD4S, D4R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrightness\u003c\/td\u003e\n\u003ctd\u003e16,000 lm per set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e70W per set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e12-24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e46.1°C (115°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Material\u003c\/td\u003e\n\u003ctd\u003e2 mm solid copper thermodynamic core\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003eAll-metal construction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBeam Adjustment\u003c\/td\u003e\n\u003ctd\u003eRotatable collar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling System\u003c\/td\u003e\n\u003ctd\u003eIC thermal controller + high-speed smart fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePolarity Protection\u003c\/td\u003e\n\u003ctd\u003eBuilt-in reverse polarity protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEMI Suppression\u003c\/td\u003e\n\u003ctd\u003eBuilt-in EMI filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStartup\u003c\/td\u003e\n\u003ctd\u003eInstantaneous full lumen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntended Use\u003c\/td\u003e\n\u003ctd\u003eOff-road use only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEstimated Shipping Weight\u003c\/td\u003e\n\u003ctd\u003e0.4 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e3-year limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need to keep my factory HID ballast?\u003c\/strong\u003e\u003cbr\u003eNo — the Heise D4 Pro Series are LED bulbs that do not require a ballast to operate. In most installations, the factory HID ballast is bypassed or removed. Consult your vehicle's wiring diagram or a professional installer if you're unsure about your specific application.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use these for daily driving?\u003c\/strong\u003e\u003cbr\u003eThe D4 Pro Series is labeled for off-road use only, as aftermarket LED kits are not DOT-certified for on-road use in the US. Many enthusiasts use them for off-road, overlanding, and trail driving where DOT compliance is not required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill these work in my projector headlight housing?\u003c\/strong\u003e\u003cbr\u003eYes — D4S and D4R sockets are exclusively used in projector headlight housings. The rotatable collar allows you to fine-tune the LED chip orientation for proper beam cutoff alignment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need a CANBUS decoder?\u003c\/strong\u003e\u003cbr\u003eOn many Japanese and European luxury vehicles with CANBUS monitoring, a decoder is recommended to prevent error codes or flickering. On older or simpler wiring systems, no decoder is typically needed.\u003c\/p\u003e","brand":"Heise LED","offers":[{"title":"Default Title","offer_id":43697920245827,"sku":"HE-D4CPRO","price":209.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0637\/9575\/7123\/files\/14218efc08cefd40e3211e0814969aa03ce35b6226d60d8708b9049f77d9330a.jpg?v=1787248624","url":"https:\/\/www.trinitycaraudio.com\/products\/heise-pro-series-led-bulbs-fits-d4s-d4r","provider":"Trinity Car Audio","version":"1.0","type":"link"}