{"title":"GU4 Halogeenilamput","description":"","products":[{"product_id":"12v-35w-mr11-30-gu4-2700k-35x35mm-halogeenikohdelamppu","title":"35W, MR11 30 °, G4, 2700K, 35x35mm, Halogen target lamp","description":"\u003cp\u003e\u003cstrong\u003eProduct code: 5941029896104\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBulb features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-end=\"177\" data-start=\"101\"\u003e\n\u003cp data-end=\"177\" data-start=\"103\"\u003e\u003cstrong data-end=\"113\" data-start=\"103\"\u003eBase:\u003c\/strong\u003e G4 \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"254\" data-start=\"178\"\u003e\n\u003cp data-end=\"254\" data-start=\"180\"\u003e\u003cstrong data-end=\"201\" data-start=\"180\"\u003eBeam angle:\u003c\/strong\u003e 30° \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"284\" data-start=\"255\"\u003e\n\u003cp data-end=\"284\" data-start=\"257\"\u003e\u003cstrong data-end=\"276\" data-start=\"257\"\u003eTotal length:\u003c\/strong\u003e 35 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"310\" data-start=\"285\"\u003e\n\u003cp data-end=\"310\" data-start=\"287\"\u003e\u003cstrong data-end=\"302\" data-start=\"287\"\u003eDiameter:\u003c\/strong\u003e 35 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"340\" data-start=\"311\"\u003e\n\u003cp data-end=\"340\" data-start=\"313\"\u003e\u003cstrong data-end=\"333\" data-start=\"313\"\u003eReflector type:\u003c\/strong\u003e Glass\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"368\" data-start=\"341\"\u003e\n\u003cp data-end=\"368\" data-start=\"343\"\u003e\u003cstrong data-end=\"361\" data-start=\"343\"\u003eBulb voltage:\u003c\/strong\u003e 12 V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"417\" data-start=\"369\"\u003e\n\u003cp data-end=\"417\" data-start=\"371\"\u003e\u003cstrong data-end=\"389\" data-start=\"371\"\u003eColor temperature:\u003c\/strong\u003e 2700 K (warm white)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"434\" data-start=\"418\"\u003e\n\u003cp data-end=\"434\" data-start=\"420\"\u003e\u003cstrong data-end=\"429\" data-start=\"420\"\u003ePower:\u003c\/strong\u003e 35 W\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Lumenled Oy","offers":[{"title":"35W \/ 2700K \/ GU4","offer_id":55583441650008,"sku":"5941019829204","price":3.82,"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","title":"20W, 350lm, MR11 30 °, G4, 2700K, 35x35mm, Halogen target lamp","description":"\u003cp\u003e\u003cstrong\u003eProduct code: 5941029896098\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBulb specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong data-end=\"51\" data-start=\"41\"\u003eBase:\u003c\/strong\u003e G4\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong data-end=\"78\" data-start=\"57\"\u003eBeam angle:\u003c\/strong\u003e 30°\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong data-end=\"104\" data-start=\"85\"\u003eOverall length:\u003c\/strong\u003e 35 mm\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong data-end=\"128\" data-start=\"113\"\u003eDiameter:\u003c\/strong\u003e 35 mm\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong data-end=\"157\" data-start=\"137\"\u003eReflector type:\u003c\/strong\u003e Glass\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong data-end=\"184\" data-start=\"165\"\u003eLamp voltage:\u003c\/strong\u003e 12 V\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong data-end=\"210\" data-start=\"192\"\u003eColour temperature:\u003c\/strong\u003e 2700 K\u003cbr\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong data-end=\"229\" data-start=\"220\"\u003ePower:\u003c\/strong\u003e 20 W\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Lumenled Oy","offers":[{"title":"20W \/ 2700K \/ GU4","offer_id":55584002474328,"sku":"5941019829198","price":3.82,"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-halogeenikohdelamppu-gu4-10w-12v","title":"MR11 Halogen Spotlight GU4 10W 12V 2700K 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. Its diameter of only 35 mm and a 30° beam angle produce a soft spotlight, and the 2700K warm tone is suitable for ambient lighting in homes, restaurants, and exhibition lighting. 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 Product\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cp\u003eThis product is an order product — delivery time is approximately \u003cstrong\u003e2 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 voltage)\u003c\/li\u003e\n  \u003cli\u003eBase: GU4 (bi-pin, 4 mm pin spacing)\u003c\/li\u003e\n  \u003cli\u003eVoltage: 12 V (requires transformer)\u003c\/li\u003e\n  \u003cli\u003ePower: 10 W\u003c\/li\u003e\n  \u003cli\u003eColor temperature: 2700 K (warm white)\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\u003eLifetime: 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: 5941019829181\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 the \u003ca href=\"\/en\/collections\/muuntajat\"\u003eElectrical Supplies → Transformers\u003c\/a\u003e category.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCheck transformer power\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe transformer's power must match the power of the lamp (or the total power of multiple lamps). For example, for a single 10W lamp, the transformer must be at least 10W. For multiple lamps, calculate the total power and choose a transformer accordingly — it's often advisable to allow for a small reserve (e.g., four 10W lamps = 40W, choose a 50–60W transformer).\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 floodlights 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 base and different size. Check the luminaire's base and 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  \u003cli\u003eSmall spotlights and display case lights\u003c\/li\u003e\n  \u003cli\u003eChandeliers and decorative luminaires requiring a small spotlight\u003c\/li\u003e\n  \u003cli\u003eExhibition lighting and artwork illumination (in the background, not as the primary target 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\u003eHalogen lamps get hot during operation — do not touch the glass surface when the lamp is on or has just been switched off. The typical lifespan is \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 a \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 luminaire has a GU4 base (not GU5.3)\u003c\/li\u003e\n  \u003cli\u003eCheck that a 12V transformer is used and that its power is sufficient for the total power of the lamps\u003c\/li\u003e\n  \u003cli\u003eCheck that the lamp's dimensions (Ø35 × 35 mm) fit the luminaire\u003c\/li\u003e\n  \u003cli\u003eTurn off the power before installation — do not touch the lamp's glass with your fingers (grease can shorten its 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 an 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 a 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":56829013590360,"sku":"5941019829181","price":3.54,"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":"Halogeeni-kohdelamppu MR11 punainen 12V 35W 30° GU4 – 35x35mm, erikoisvalaistus","description":"\u003cp\u003eTämä on punainen MR11-halogeenikohdelamppu erityiskäyttöön. 12 V halogeenitekniikka, 35 W teho ja 30° kohdevalokulma — sopii kohteisiin, joissa halutaan punainen kohdevalo: ravintolat, näyttelyt, juhlatilat, baarit, valokuvaus-studiot ja sisustusyksityiskohdat. 2800 K värilämpötila ja punainen suodatin tuottavat lämmintä punaista valoa.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e12 V halogeeni — tarvitsee 12V muuntajan. GU4-kanta (MR11). Punainen kohdevalo — ei korvaa valkoista yleisvaloa. Lyhyt halogeenikäyttöikä.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cdiv class=\"product-notice product-notice--warning\"\u003e\n\u003cp\u003e\u003cstrong\u003e⚠ Tilaustuote\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eToimitusaika noin \u003cstrong\u003e1–1½ viikkoa\u003c\/strong\u003e tilauksesta. Saatavuuden voi tarkistaa ostoskorista.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eTekniset tiedot\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTuotetyyppi: punainen halogeenikohdelamppu, MR11\u003c\/li\u003e\n\u003cli\u003eLampun tyyppi: MR11 (Multifaceted Reflector, 11\/8 tuumaa = 35 mm)\u003c\/li\u003e\n\u003cli\u003eKanta: GU4\u003c\/li\u003e\n\u003cli\u003eTeho: 35 W\u003c\/li\u003e\n\u003cli\u003eVärilämpötila: 2800 K (punaisen suodattimen läpi)\u003c\/li\u003e\n\u003cli\u003eVärisuodatus: punainen\u003c\/li\u003e\n\u003cli\u003eValokeila (avautumiskulma): 30°\u003c\/li\u003e\n\u003cli\u003eHeijastimen tyyppi: lasi\u003c\/li\u003e\n\u003cli\u003eNimellisjännite: 12 V\u003c\/li\u003e\n\u003cli\u003eMatalapainetekniikka: kyllä\u003c\/li\u003e\n\u003cli\u003eInfrapunapinnoite: ei\u003c\/li\u003e\n\u003cli\u003eMitat: Ø 35 × 35 mm\u003c\/li\u003e\n\u003cli\u003eTuotekoodi: HC301203530R\u003c\/li\u003e\n\u003cli\u003eSähkönumero (EAN): 8714681071076\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eYhteensopivuus ja käyttö\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003e\u003cstrong\u003eErikoiskäyttöön suunniteltu\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePunainen valo ei sovi yleisvalaistukseen — tämä on suunniteltu nimenomaan erikoiskäyttöön, jossa halutaan punainen sävy. Tyypillisiä käyttökohteita:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRavintolat ja baarit (tunnelmavalaistus)\u003c\/li\u003e\n\u003cli\u003eNäyttelyt ja museot (esineiden korostus)\u003c\/li\u003e\n\u003cli\u003eJuhlatilat ja teatterit\u003c\/li\u003e\n\u003cli\u003eValokuvausstudiot\u003c\/li\u003e\n\u003cli\u003eSisustusyksityiskohtien valaisu\u003c\/li\u003e\n\u003cli\u003ePimennetyt tilat — esim. astronomian harrastajien työtilat\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e12 V — muuntaja vaaditaan\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMR11 toimii aina 12 V jännitteellä. Useimmissa MR11-valaisimissa on jo sisäänrakennettu muuntaja. Jos rakennat omaa valaistuskokoonpanoa, tutustu valikoimaamme \u003ca href=\"\/en\/collections\/muuntajat\"\u003emuuntajat\u003c\/a\u003e -kategoriassa.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGU4-kanta — kaksipiikkinen 4 mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGU4 on MR11-lamppujen vakiokanta. Tarkista valaisin ennen ostoa, että GU4 on oikea kanta — isommissa kohdevaloissa on usein GU5.3 (MR16) tai GU10 (suora 230 V).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLED-vaihtoehto\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePunaisia LED-MR11-lamppuja on saatavilla, mutta yhteensopivuus vanhojen halogeenimuuntajien kanssa voi olla ongelmallinen. Halogeenilamppu toimii aina luotettavasti. Sisarmallit valikoimassamme — \u003ca href=\"\/en\/products\/12v-20w-mr11-30-gu4-2800k-35x35mm-halogeenikohdelamppu\"\u003etavallinen 20W MR11 valkoinen\u003c\/a\u003e, sama mitat ja kanta.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKäyttöikä — tyypillinen halogeenille\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eHalogeenilampun käyttöikä on tyypillisesti 2000 tuntia. Erikoiskäytössä — esim. ravintolan iltavalaistus — todellinen käyttöaika jää usein muutamaan tuntiin päivässä, joten yksi lamppu kestää useita vuosia.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAsennuksen tarkistuslista\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eKäännä virta pois pääkytkimestä\u003c\/li\u003e\n\u003cli\u003eAnna vanhan lampun jäähtyä täysin\u003c\/li\u003e\n\u003cli\u003eÄlä koske polttimoon paljain käsin — sormirasva vaurioittaa lasia\u003c\/li\u003e\n\u003cli\u003eKäytä puhdasta liinaa tai käsinettä\u003c\/li\u003e\n\u003cli\u003eAsenna uusi lamppu paikalleen — kaksi piikkiä uriin\u003c\/li\u003e\n\u003cli\u003eKäännä virta päälle ja testaa\u003c\/li\u003e\n\u003c\/ol\u003e\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:\/\/www.lumenled.fi\/en\/collections\/gu4-halogeenilamput.oembed","provider":"Lumenled Oy","version":"1.0","type":"link"}