{"title":"GU4 Halogen lamps","description":"","products":[{"product_id":"12v-35w-mr11-30-gu4-2700k-35x35mm-halogeenikohdelamppu-patron","title":"12V, 35W, MR11 30°, GU4, 2700K, 35x35mm, Patron Halogen Spotlight","description":"\u003ch2\u003e\u003cstrong\u003eMade-to-order product\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cstrong\u003eDelivery time approx. 2 weeks\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct code: 5941019829204\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLamp features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eBase:\u003c\/strong\u003e GU4 \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eBeam angle:\u003c\/strong\u003e 30° \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eTotal length:\u003c\/strong\u003e 35 mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eDiameter:\u003c\/strong\u003e 35 mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eReflector type:\u003c\/strong\u003e Glass\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eLamp voltage:\u003c\/strong\u003e 12 V\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003eColor temperature:\u003c\/strong\u003e 2700 K (warm white)\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cstrong\u003ePower:\u003c\/strong\u003e 35 W\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Patron","offers":[{"title":"35W \/ 2700K \/ GU4","offer_id":55583441650008,"sku":"5941019829204","price":4.58,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0577\/2171\/6917\/files\/220e0d33463141d94839d4473a5865afa5c47fd9_png.webp?v=1756140941"},{"product_id":"12v-20w-350lm-mr11-30-gu4-2700k-35x35mm-halogeenikohdelamppu-patron","title":"12V, 20W, 350lm, MR11 30°, GU4, 2700K, 35x35mm, Patron halogen spotlight","description":"\u003cp\u003e\u003cstrong\u003eProduct code: 5941019829198\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLamp features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eBase:\u003c\/strong\u003e GU4\u003cbr\u003e\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eBeam angle:\u003c\/strong\u003e 30°\u003cbr\u003e\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eOverall length:\u003c\/strong\u003e 35 mm\u003cbr\u003e\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 35 mm\u003cbr\u003e\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eReflector type:\u003c\/strong\u003e Glass\u003cbr\u003e\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eLamp voltage:\u003c\/strong\u003e 12 V\u003cbr\u003e\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eColor temperature:\u003c\/strong\u003e 2700 K\u003cbr\u003e\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003ePower:\u003c\/strong\u003e 20 W\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Patron","offers":[{"title":"20W \/ 2700K \/ GU4","offer_id":55584002474328,"sku":"5941019829198","price":4.58,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0577\/2171\/6917\/files\/220e0d33463141d94839d4473a5865afa5c47fd9_png.webp?v=1756140941"},{"product_id":"12v-20w-mr11-30-gu4-2800k-35x35mm-halogeenikohdelamppu","title":"Halogen spotlight MR11 GU4 12V 20W 2800K 30° – 35x35mm clear","description":"\u003cp\u003eThis is a traditional MR11 halogen spotlight lamp, used to replace broken MR11 halogens in luminaires. Featuring 12 V halogen technology, 20 W power, and a 30° beam angle—it's suitable for older MR11 luminaires where LED alternatives don't work (e.g., compatibility issues with transformers or dimmers). The 2800 K colour temperature produces a warm and familiar halogen tone.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e12 V halogen—requires a 12V transformer. GU4 base (MR11). The lifespan is typical for halogen (approx. 2000 h), significantly shorter than LEDs.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cdiv class=\"product-notice product-notice--warning\"\u003e\n\u003cp\u003e\u003cstrong\u003e⚠ Order item\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDelivery time approximately \u003cstrong\u003e1–1½ weeks\u003c\/strong\u003e from order. Availability can be checked in the shopping cart.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProduct type: Halogen spotlight lamp, MR11\u003c\/li\u003e\n\u003cli\u003eLamp type: MR11 (Multifaceted Reflector, 11\/8 inches = 35 mm)\u003c\/li\u003e\n\u003cli\u003eBase: GU4\u003c\/li\u003e\n\u003cli\u003ePower: 20 W\u003c\/li\u003e\n\u003cli\u003eBeam angle: 30°\u003c\/li\u003e\n\u003cli\u003eColour temperature: 2800 K (warm white)\u003c\/li\u003e\n\u003cli\u003eNominal voltage: 12 V\u003c\/li\u003e\n\u003cli\u003eDimensions: Ø 35 × 35 mm\u003c\/li\u003e\n\u003cli\u003eProduct code: HC301202030\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eCompatibility and installation\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003e\u003cstrong\u003eWhen to stick with halogen?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMR11 LED alternatives are available, but compatibility issues are common—especially with old halogen transformers and dimmers, LEDs can flicker or fail to light up. Halogen lamps always work with these components, making them a safe choice as a replacement when you don't want to modify an existing luminaire.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e12 V — transformer required\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMR11 always operates at 12 V voltage and never directly on 230 V mains voltage. Most MR11 luminaires already have a built-in transformer. If you are building your own lighting setup, check our selection in the \u003ca href=\"\/en\/collections\/muuntajat\"\u003etransformers\u003c\/a\u003e category.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGU4 base — two pins\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGU4 is a two-pin base with a pin spacing of 4 mm. This is the standard base for MR11 lamps. Check the luminaire before purchasing to ensure GU4 is the correct base—larger spotlights often use GU5.3 (MR16 version) or GU10 (direct 230 V).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMR11 vs MR16\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMR11 (this, Ø 35 mm):\u003c\/strong\u003e smaller, suitable for compact luminaires (display cases, furniture lighting, small spotlights)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMR16 (Ø 50 mm):\u003c\/strong\u003e larger, more common, suitable for most recesses and spotlights\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCheck the luminaire dimensions before purchasing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBeam angle 30°\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e30° is a narrow spotlight beam angle that precisely concentrates light on a defined area. Especially suitable for accentuating artwork, objects, or work surfaces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLifespan — typical for halogen\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe lifespan of a halogen lamp is typically 2000 hours—significantly shorter than an LED lamp (25,000+ h). Be prepared for replacements and consider an LED switch if the luminaire and transformer allow it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation checklist\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eTurn off the power at the main switch\u003c\/li\u003e\n\u003cli\u003eAllow the old lamp to cool completely\u003c\/li\u003e\n\u003cli\u003eDo not touch the bulb with bare hands—finger grease damages the glass\u003c\/li\u003e\n\u003cli\u003eUse a clean cloth or glove\u003c\/li\u003e\n\u003cli\u003eInstall the new lamp—two pins into the slots\u003c\/li\u003e\n\u003cli\u003eTurn on the power and test\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/details\u003e","brand":"Lumenled Oy","offers":[{"title":"20W","offer_id":56571111145816,"sku":"HC301202030","price":3.91,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0577\/2171\/6917\/files\/HC301202030.webp?v=1768989283"},{"product_id":"mr11-halogeenikohdelamppu-gu4-10w-12v-2800k","title":"MR11 Halogen Spotlight GU4 10W 12V 2800K 30° – small spotlight, glass reflector","description":"\u003cp\u003eThe MR11 halogen spotlight is a small low-voltage lamp, especially suitable for small spotlights, chandeliers, display cases, and decorative lighting. With a diameter of only 35 mm and a beam angle of 30°, it produces a soft spotlight, and the warm 2800K tone is the natural color temperature of a classic halogen lamp — an authentic, warm white light that accentuates natural colors. The glass reflector provides bright and natural light distribution.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRequires a 12V transformer. GU4 base — not to be confused with GU5.3 (MR16) base.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cdiv class=\"product-notice product-notice--warning\"\u003e\n  \u003cp\u003e\u003cstrong\u003e⚠ Order Item\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cp\u003eThis product is an order item — delivery time is approximately \u003cstrong\u003e1–1½ weeks\u003c\/strong\u003e from order. Please take this into account if you need the lamp quickly.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eLamp Type: MR11 halogen spotlight (low-pressure technology)\u003c\/li\u003e\n  \u003cli\u003eBase: GU4 (two-pin, 4 mm pin spacing)\u003c\/li\u003e\n  \u003cli\u003eVoltage: 12 V (requires a transformer)\u003c\/li\u003e\n  \u003cli\u003ePower: 10 W\u003c\/li\u003e\n  \u003cli\u003eColor Temperature: 2800 K (classic halogen natural tone)\u003c\/li\u003e\n  \u003cli\u003eBeam Angle: 30° (spotlight)\u003c\/li\u003e\n  \u003cli\u003eColor Rendering Index (CRI): Ra 100 (typical for halogen)\u003c\/li\u003e\n  \u003cli\u003eReflector Type: Glass\u003c\/li\u003e\n  \u003cli\u003eLifespan: typically 2,000–4,000 hours\u003c\/li\u003e\n  \u003cli\u003eDimmable: Yes (with compatible dimmers)\u003c\/li\u003e\n  \u003cli\u003eDiameter: 35 mm\u003c\/li\u003e\n  \u003cli\u003eLength: 35 mm\u003c\/li\u003e\n  \u003cli\u003eProduct Code: HC301201030\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eCompatibility and Installation\u003c\/strong\u003e\u003c\/summary\u003e\n\n\u003cp\u003e\u003cstrong\u003eRequires a 12V transformer\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis is a 12V low-voltage lamp that requires a 12V transformer to operate. The transformer converts the household 230V mains voltage to 12V. Compatible transformers (both electronic and magnetic) can be found in our selection under \u003ca href=\"\/en\/collections\/muuntajat\"\u003eElectrical Supplies → Transformers\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCheck transformer wattage\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe transformer's wattage must match the lamp (or the total wattage of multiple lamps). For example, for one 10W lamp, the transformer must be at least 10W. For multiple lamps, calculate the total wattage and choose a transformer accordingly — it's often wise to have a small reserve (e.g., four 10W lamps = 40W, choose a 50–60W transformer).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e2800K — classic halogen tone\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis lamp produces 2800K warm white light, which is the natural color temperature of a traditional halogen lamp. The tone is:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSlightly more neutral than 2700K (which is incandescent-like warm)\u003c\/li\u003e\n  \u003cli\u003eSlightly warmer than 3000K (which is a more neutral warm white)\u003c\/li\u003e\n  \u003cli\u003eAuthentic halogen tone for a lamp burning at full power\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eParticularly suitable for situations where a natural warm ambiance is desired — households, restaurants, hotel spaces, display cases, and accent lighting.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMR11 vs MR16 — an important distinction\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eMR-type low-voltage spotlights are available in several sizes:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMR11\u003c\/strong\u003e — diameter \u003cstrong\u003e35 mm\u003c\/strong\u003e, base \u003cstrong\u003eGU4\u003c\/strong\u003e (4 mm pins) — this product\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMR16\u003c\/strong\u003e — diameter 51 mm, base GU5.3 (5.3 mm pins) — larger alternative\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThese are not interchangeable — different bases and different sizes. Check the fixture's base and the lamp's size requirement before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTypical applications\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSmall spotlights and display case lighting\u003c\/li\u003e\n  \u003cli\u003eChandeliers and decorative lighting where a small spotlight is needed\u003c\/li\u003e\n  \u003cli\u003eExhibition lighting and illumination of artworks (in the background, not as a main subject due to prolonged exposure)\u003c\/li\u003e\n  \u003cli\u003eHotel and restaurant premises\u003c\/li\u003e\n  \u003cli\u003eOld decorative luminaires where MR11 size is standard\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eHalogen lamp — usage considerations\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eA halogen lamp gets hot during use — do not touch the glass surface when the lamp is on or has just been turned off. The lifespan is typically \u003cstrong\u003e2,000–4,000 hours\u003c\/strong\u003e, which is significantly shorter than LED alternatives (15,000–25,000 h). However, halogen retains its advantages with \u003cstrong\u003eperfect CRI 100 color rendering\u003c\/strong\u003e, which is ideal for professional use (artworks, jewelry, colorful products).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eInstallation checklist\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003col\u003e\n  \u003cli\u003eCheck that the fixture has a GU4 base (not GU5.3)\u003c\/li\u003e\n  \u003cli\u003eCheck that a 12V transformer with sufficient power for the total wattage of the lamps is in use\u003c\/li\u003e\n  \u003cli\u003eCheck that the lamp dimensions (Ø35 × 35 mm) fit the fixture\u003c\/li\u003e\n  \u003cli\u003eTurn off the power before installation — do not touch the lamp glass with your fingers (grease can shorten lifespan)\u003c\/li\u003e\n  \u003cli\u003eInstall the lamp and turn on the power\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003e\u003cstrong\u003eConsider LED alternative\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf energy saving and longer lifespan are important, consider \u003ca href=\"\/en\/collections\/gu5-3-led-kohdelamput\"\u003eMR11 LED spotlights\u003c\/a\u003e, which use about 80% less energy and last up to 25,000 hours. However, halogen retains its advantages with perfect CRI 100 color rendering, which is particularly important for illuminating artworks and jewelry.\u003c\/p\u003e\n\u003c\/details\u003e","brand":"Lumenled Oy","offers":[{"title":"10W \/ GU4","offer_id":56828998811992,"sku":"HC301201030","price":5.33,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0577\/2171\/6917\/files\/HC301202030_8df14855-fb4b-4355-8ee3-c64072757ad5.webp?v=1772525798"},{"product_id":"mr11-patron-halogeenikohdelamppu-gu4-10w-12v","title":"MR11 Patron halogen spotlight bulb GU4 10W 12V 2700K 30° – small spotlight, glass reflector","description":"\u003cp\u003eThe MR11 halogen spotlight is a small low-voltage lamp, particularly suitable for small spotlights, chandeliers, display cabinets, and decorative lighting. The 35 mm diameter and 30° beam angle produce a soft spotlight, while the 2700K warm tone is suitable for creating ambiance in households, restaurants, and exhibition lighting. The glass reflector provides clear and natural light distribution.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e⚠ Made-to-order product\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDelivery time approximately\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1 week\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efrom order. Availability can be checked in the shopping cart.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRequires a 12V transformer. GU4 base — not to be confused with the GU5.3 (MR16) base.\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003eLamp type: MR11 halogen spotlight (low voltage)\u003c\/li\u003e\n\n\u003cli\u003eBase: GU4 (two-pin, 4 mm pin spacing)\u003c\/li\u003e\n\n\u003cli\u003eVoltage: 12 V (requires a transformer)\u003c\/li\u003e\n\n\u003cli\u003ePower: 10 W\u003c\/li\u003e\n\n\u003cli\u003eColor temperature: 2700 K (warm white)\u003c\/li\u003e\n\n\u003cli\u003eBeam angle: 30° (spotlight)\u003c\/li\u003e\n\n\u003cli\u003eColor rendering index (CRI): Ra 100 (typical for halogen)\u003c\/li\u003e\n\n\u003cli\u003eReflector type: Glass\u003c\/li\u003e\n\n\u003cli\u003eService life: typically 2,000–4,000 hours\u003c\/li\u003e\n\n\u003cli\u003eDimmable: Yes (with compatible dimmers)\u003c\/li\u003e\n\n\u003cli\u003eDiameter: 35 mm\u003c\/li\u003e\n\n\u003cli\u003eLength: 35 mm\u003c\/li\u003e\n\n\u003cli\u003eProduct code: 5941019829181\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eCompatibility and installation\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003e\u003cstrong\u003eRequires a 12V transformer\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis is a 12V low-voltage lamp that requires a 12V transformer to operate. The transformer converts the household 230V mains voltage to 12V. You can find compatible transformers (both electronic and magnetic) in our selection under the \u003ca href=\"\/en\/collections\/muuntajat\"\u003eElectrical Supplies → Transformers\u003c\/a\u003e category.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCheck the transformer wattage\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe transformer's power must match the lamp (or the total power of multiple lamps). For example, for one 10W lamp, the transformer must be at least 10W. For several lamps, calculate the total power and choose the transformer accordingly — it is often advisable to leave a small margin (e.g., four 10W lamps = 40W, choose a 50–60W transformer).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMR11 vs. MR16 — important distinction\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eMR-type low-voltage spotlights are available in several sizes:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMR11\u003c\/strong\u003e — diameter \u003cstrong\u003e35 mm\u003c\/strong\u003e, base \u003cstrong\u003eGU4\u003c\/strong\u003e (4 mm pins) — this product\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMR16\u003c\/strong\u003e — diameter 51 mm, base GU5.3 (5.3 mm pins) — larger alternative\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003eThese are not interchangeable — they have different bases and sizes. Check the fixture base and the lamp size requirements before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTypical applications\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003eSmall spotlights and cabinet lights\u003c\/li\u003e\n\n\u003cli\u003eChandeliers and decorative fixtures requiring a small spotlight\u003c\/li\u003e\n\n\u003cli\u003eExhibition lighting and art display lighting (for background, not main spotlighting due to long-term exposure)\u003c\/li\u003e\n\n\u003cli\u003eHotel and restaurant spaces\u003c\/li\u003e\n\n\u003cli\u003eVintage interior lamps where the MR11 size is standard\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eHalogen lamp — usage notes\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eHalogen lamps get hot during use — do not touch the glass surface when the lamp is on or has just been turned off. The service life is typically \u003cstrong\u003e2,000–4,000 hours\u003c\/strong\u003e, which is significantly shorter than LED alternatives (15,000–25,000 h). However, halogen retains its advantage with \u003cstrong\u003eperfect CRI 100 color rendering\u003c\/strong\u003e, which is ideal for professional use (art pieces, jewelry, colorful products).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eInstallation checklist\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003col\u003e\n\n\u003cli\u003eCheck that the fixture has a GU4 base (not GU5.3)\u003c\/li\u003e\n\n\u003cli\u003eCheck that you are using a 12V transformer with sufficient power for the total wattage of the lamps\u003c\/li\u003e\n\n\u003cli\u003eCheck that the lamp dimensions (Ø35 × 35 mm) fit the fixture\u003c\/li\u003e\n\n\u003cli\u003eTurn off the power before installation — do not touch the lamp glass with your fingers (grease can shorten service life)\u003c\/li\u003e\n\n\u003cli\u003eInstall the lamp and turn the power on\u003c\/li\u003e\n\n\n\u003c\/ol\u003e\n\n\u003cp\u003e\u003cstrong\u003eConsider an LED alternative\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf energy savings and longer service life are important, consider \u003ca href=\"\/en\/collections\/gu5-3-led-kohdelamput\"\u003eMR11 LED spotlights\u003c\/a\u003e, which use about 80% less energy and last up to 25,000 hours. However, halogen retains its advantage with perfect CRI 100 color rendering, which is particularly important when lighting art pieces and jewelry.\u003c\/p\u003e\n\n\u003c\/details\u003e","brand":"Patron","offers":[{"title":"10W \/ GU4","offer_id":56829013590360,"sku":"5941019829181","price":4.58,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0577\/2171\/6917\/files\/4e875505a31de2820fceeefff5980be35a60c434_png.webp?v=1772526106"},{"product_id":"12v-35w-mr11-30-gu4-2800k-35x35mm-punainen-halogeenikohdelamppu","title":"Halogen spotlight MR11 red 12V 35W 30° GU4 – 35x35mm, special lighting","description":"\u003cp\u003eThis is a red MR11 halogen spotlight for special applications. 12 V halogen technology, 35 W power, and a 30° beam angle — suitable for environments where a red spotlight is desired: restaurants, exhibitions, party venues, bars, photography studios, and interior details. A 2800 K color temperature and a red filter produce warm red light.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e12 V halogen — requires a 12V transformer. GU4 base (MR11). Red spotlight — does not replace white general lighting. Short halogen lifespan.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cdiv class=\"product-notice product-notice--warning\"\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠ Made-to-order item\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDelivery time approximately \u003cstrong\u003e1–1½ weeks\u003c\/strong\u003e from the order. Availability can be checked in the shopping cart.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003eProduct type: red halogen spotlight, MR11\u003c\/li\u003e\n\n\u003cli\u003eLamp type: MR11 (Multifaceted Reflector, 11\/8 inches = 35 mm)\u003c\/li\u003e\n\n\u003cli\u003eBase: GU4\u003c\/li\u003e\n\n\u003cli\u003ePower: 35 W\u003c\/li\u003e\n\n\u003cli\u003eColor temperature: 2800 K (through a red filter)\u003c\/li\u003e\n\n\u003cli\u003eColor filtering: red\u003c\/li\u003e\n\n\u003cli\u003eBeam angle: 30°\u003c\/li\u003e\n\n\u003cli\u003eReflector type: glass\u003c\/li\u003e\n\n\u003cli\u003eNominal voltage: 12 V\u003c\/li\u003e\n\n\u003cli\u003eLow-pressure technology: yes\u003c\/li\u003e\n\n\u003cli\u003eInfrared coating: no\u003c\/li\u003e\n\n\u003cli\u003eDimensions: Ø 35 × 35 mm\u003c\/li\u003e\n\n\u003cli\u003eProduct code: HC301203530R\u003c\/li\u003e\n\n\u003cli\u003eElectrical number (EAN): 8714681071076\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eCompatibility and usage\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003e\u003cstrong\u003eDesigned for special use\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eRed light is not suitable for general lighting — this is designed specifically for special applications where a red tone is desired. Typical use cases:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003eRestaurants and bars (mood lighting)\u003c\/li\u003e\n\n\u003cli\u003eExhibitions and museums (highlighting objects)\u003c\/li\u003e\n\n\u003cli\u003eParty venues and theaters\u003c\/li\u003e\n\n\u003cli\u003ePhotography studios\u003c\/li\u003e\n\n\u003cli\u003eLighting interior details\u003c\/li\u003e\n\n\u003cli\u003eDarkened rooms — e.g., workspaces for astronomy enthusiasts\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003e12 V — transformer required\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eMR11 always operates at 12 V voltage. Most MR11 fixtures already have a built-in transformer. If you are building your own lighting setup, explore our selection in the \u003ca href=\"\/en\/collections\/muuntajat\"\u003etransformers\u003c\/a\u003e category.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eGU4 base — two-pin 4 mm\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eGU4 is the standard base for MR11 lamps. Check the fixture before purchase to ensure GU4 is the correct base — larger spotlights often use GU5.3 (MR16) or GU10 (direct 230 V).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eLED alternative\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eRed LED MR11 lamps are available, but compatibility with old halogen transformers can be problematic. A halogen lamp always works reliably. Sister models in our selection — \u003ca href=\"\/en\/products\/12v-20w-mr11-30-gu4-2800k-35x35mm-halogeenikohdelamppu\"\u003estandard 20W MR11 white\u003c\/a\u003e, same dimensions and base.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eLifespan — typical for halogen\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe lifespan of a halogen lamp is typically 2,000 hours. In special use — e.g., restaurant evening lighting — the actual usage time often remains at a few hours a day, so one lamp lasts for several years.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eInstallation checklist\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003col\u003e\n\n\u003cli\u003eTurn off the power from the main switch\u003c\/li\u003e\n\n\u003cli\u003eLet the old lamp cool down completely\u003c\/li\u003e\n\n\u003cli\u003eDo not touch the bulb with bare hands — finger oils will damage the glass\u003c\/li\u003e\n\n\u003cli\u003eUse a clean cloth or glove\u003c\/li\u003e\n\n\u003cli\u003eInstall the new lamp — two pins into the slots\u003c\/li\u003e\n\n\u003cli\u003eTurn on the power and test\u003c\/li\u003e\n\n\n\u003c\/ol\u003e\n\n\u003c\/details\u003e","brand":"Lumenled Oy","offers":[{"title":"35W","offer_id":57384957542744,"sku":"HC301203530R","price":3.82,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0577\/2171\/6917\/files\/HC301203530R.webp?v=1779953503"}],"url":"https:\/\/lomenled.com\/en\/collections\/gu4-halogeenilamput.oembed","provider":"Lumenled Oy","version":"1.0","type":"link"}