{"product_id":"sylvania-refled-retro-mr11-gu5-3-4w","title":"Sylvania RefLED Retro MR11 GU5.3 4W 345lm 36° 12V – glass body, replaces 35W","description":"\u003cp\u003eThe Sylvania RefLED Retro MR11 is a premium LED spotlight with a glass body construction, designed to replace traditional 35W GU5.3 halogen lamps. This is a special model — physically MR11-sized (35 mm diameter) but with a GU5.3 base, making it suitable for fixtures that use a GU5.3 holder but require a smaller bulb than the standard MR16. Operates on 12V low voltage with both magnetic and electronic transformers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGU5.3 base, MR11 size (35 mm diameter). Operates on 12V AC\/DC. Requires a transformer. Not dimmable.\u003c\/strong\u003e\u003c\/p\u003e\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\u003eThis product is made-to-order — delivery time is approximately \u003cstrong\u003e2 weeks\u003c\/strong\u003e from the order date. You can check availability in the shopping cart.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv class=\"product-notice product-notice--info\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eℹ Special model — MR11 size with GU5.3 base\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis is a rare combination — a physically MR11-sized bulb (35 mm diameter) but with a GU5.3 base (typically used in 51 mm MR16 bulbs). Measure the diameter of your existing bulb before ordering to ensure compatibility.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\u003cdiv class=\"product-notice product-notice--success\"\u003e\n\n\u003cp\u003e\u003cstrong\u003e✓ 3-year warranty — premium quality\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eSylvania provides a \u003cstrong\u003e3-year warranty\u003c\/strong\u003e for this product, which is significantly better than the 2-year warranty of standard LED bulbs. The glass construction and 50,000 switching cycle durability support this promise.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003eReplaces traditional 35W GU5.3 base halogen bulb\u003c\/li\u003e\n\n\u003cli\u003eLamp type: LED spotlight (Retro, glass body)\u003c\/li\u003e\n\n\u003cli\u003eBrand: Sylvania\u003c\/li\u003e\n\n\u003cli\u003eSeries: RefLED Retro MR11\u003c\/li\u003e\n\n\u003cli\u003eBase: GU5.3 (two-pin, 5.3 mm pins)\u003c\/li\u003e\n\n\u003cli\u003eVoltage: 12 V AC\/DC (requires transformer)\u003c\/li\u003e\n\n\u003cli\u003ePower: 4 W\u003c\/li\u003e\n\n\u003cli\u003eLuminous flux: 345 lm\u003c\/li\u003e\n\n\u003cli\u003eColor temperature: 3000 K or 4000 K (selectable)\u003c\/li\u003e\n\n\u003cli\u003eBeam angle: 36° (wide spotlight)\u003c\/li\u003e\n\n\u003cli\u003eColor Rendering Index (CRI): 80\u003c\/li\u003e\n\n\u003cli\u003eLifespan: 15,000 hours\u003c\/li\u003e\n\n\u003cli\u003eSwitching cycles: 50,000 (premium class)\u003c\/li\u003e\n\n\u003cli\u003eLamp construction: full glass body (no plastic)\u003c\/li\u003e\n\n\u003cli\u003eCompatibility: magnetic and compatible electronic transformers\u003c\/li\u003e\n\n\u003cli\u003eDimmable: No\u003c\/li\u003e\n\n\u003cli\u003eWarranty: 3 years\u003c\/li\u003e\n\n\u003cli\u003eDiameter: 35 mm (MR11 size)\u003c\/li\u003e\n\n\u003cli\u003eLength: 40 mm\u003c\/li\u003e\n\n\u003cli\u003eProduct codes: 3000K = 0031831 \/ 4000K = 0031832\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\u003eMR11 size with GU5.3 base — a unique combination\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe dimensions of most GU5.3 base spotlights are:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eStandard MR16:\u003c\/strong\u003e diameter 51 mm, base GU5.3 — the most common\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eThis Sylvania special model:\u003c\/strong\u003e diameter 35 mm (MR11 size), base GU5.3 — rarer\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eStandard MR11:\u003c\/strong\u003e diameter 35 mm, base GU4 (4 mm pins) — different\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003eThis Sylvania model is suitable for fixtures that have:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003eA GU5.3 base but where the lamp housing is smaller than 51 mm\u003c\/li\u003e\n\n\u003cli\u003eCustom-made (e.g., imported from the USA) fixtures\u003c\/li\u003e\n\n\u003cli\u003eVintage and retro-style fixtures where the small lamp size is part of the aesthetic\u003c\/li\u003e\n\n\u003cli\u003eSmaller spotlights and display cabinets\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCheck the lamp dimensions before ordering\u003c\/strong\u003e — measure the diameter of your existing halogen to ensure compatibility.\u003c\/p\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. This Sylvania model is compatible with both:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMagnetic transformers\u003c\/strong\u003e (traditional, heavier) — common in older light fixtures\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eElectronic transformers\u003c\/strong\u003e — lightweight, more modern technology, in almost all new fixtures\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003eCompatibility with electronic transformers depends on the exact model of the transformer — not all may work with this LED bulb. The most common compatible brands are Helvar, Tridonic, Osram, Ledvance, and Vossloh-Schwabe.\u003c\/p\u003e\n\n\u003cp\u003eYou can find compatible transformers in 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 wattage must match the lamp (or the combined wattage of multiple lamps). For one 4W lamp, the transformer should be at least about 5W (reserve a small margin). For multiple lamps:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e2 lamps = 8W → transformer at least 10W\u003c\/li\u003e\n\n\u003cli\u003e5 lamps = 20W → transformer at least 25W\u003c\/li\u003e\n\n\u003cli\u003e10 lamps = 40W → transformer at least 50W\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eGlass body — premium quality\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eUnlike regular plastic LED bulbs, this Sylvania RefLED Retro has a full glass body — the same material as traditional halogen bulbs:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003eMore even light distribution than plastic\u003c\/li\u003e\n\n\u003cli\u003eNo yellowing over time\u003c\/li\u003e\n\n\u003cli\u003eHalogen-like appearance — fits seamlessly into old fixtures\u003c\/li\u003e\n\n\u003cli\u003eWithstands higher temperatures than plastic\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eReplaces 35W GU5.3 halogen — 89% energy saving\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis 4W LED produces the same light output as a traditional 35W GU5.3 halogen. Energy savings are approximately \u003cstrong\u003e89%\u003c\/strong\u003e, and the lifespan is:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e35W GU5.3 halogen: 2,000–4,000 h\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eThis Sylvania RefLED Retro: 15,000 h\u003c\/strong\u003e — 4–7 times longer\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp\u003eIn addition, the \u003cstrong\u003e50,000 switching cycles\u003c\/strong\u003e make this an excellent option for fixtures that are switched on and off frequently (e.g., motion-sensor lights, bathrooms, storage rooms).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThis lamp is not dimmable\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDo not install the lamp in a fixture equipped with a dimmer. The lamp may flicker, stay on at full brightness, or be damaged.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e36° beam angle — wide spotlight\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis lamp's 36° beam angle is a \"flood\" category — a wide spotlight suitable for:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003eGeneral lighting in small spaces\u003c\/li\u003e\n\n\u003cli\u003eAmbient lighting in hotels, restaurants, and bars\u003c\/li\u003e\n\n\u003cli\u003eSmall spotlights and display cabinet lights\u003c\/li\u003e\n\n\u003cli\u003eChandeliers and multi-lamp fixtures where the MR11 size fits\u003c\/li\u003e\n\n\n\u003c\/ul\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 GU5.3 base (not GU4 or GU10)\u003c\/li\u003e\n\n\u003cli\u003eMeasure the diameter of the lamp housing — 35 mm of space is required (not larger MR16 space)\u003c\/li\u003e\n\n\u003cli\u003eCheck that a 12V transformer is being used (magnetic or electronic)\u003c\/li\u003e\n\n\u003cli\u003eCheck that the transformer's wattage is sufficient for the total wattage of the lamps\u003c\/li\u003e\n\n\u003cli\u003eCheck that the fixture does not have a dimmer\u003c\/li\u003e\n\n\u003cli\u003eTurn off the power before installation — do not touch the lamp glass with your fingers\u003c\/li\u003e\n\n\u003cli\u003eInstall the lamp and turn on the power\u003c\/li\u003e\n\n\n\u003c\/ol\u003e\n\n\u003cp\u003eAlso check out the \u003ca href=\"\/en\/collections\/gu5-3-led-kohdelamput\"\u003eother GU5.3 LED spotlights\u003c\/a\u003e in our selection.\u003c\/p\u003e\n\n\u003c\/details\u003e","brand":"Sylvania","offers":[{"title":"4WD \/ 3000K \/ GU5.3","offer_id":56572172697944,"sku":"0031831","price":9.4,"currency_code":"EUR","in_stock":true},{"title":"4WD \/ 4000K \/ GU5.3","offer_id":56572172730712,"sku":"0031832","price":9.4,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0577\/2171\/6917\/files\/0031830.jpg?v=1769005198","url":"https:\/\/lomenled.com\/en\/products\/sylvania-refled-retro-mr11-gu5-3-4w","provider":"Lumenled Oy","version":"1.0","type":"link"}