{"product_id":"osram-decostar-51s-gu5-3-35w-12v","title":"Osram Decostar 51S GU5.3 35W 12V 2900K 36° – dichroic reflector, dimmable","description":"\u003cp\u003eThe Osram Decostar 51S is a premium MR16 halogen spotlight lamp with a cold light mirror, which reduces beam heat by up to 66%. Warm white 2900K light, perfect color rendering (CRI Ra 100), and a 36° beam angle — an ideal choice for accent lighting, display case illumination, and spotlighting artwork. A UV filter protects colors from fading.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRequires a 12V transformer. GU5.3 base. Dimmable.\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 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: MR16 halogen spotlight lamp, cold light mirror\u003c\/li\u003e\n  \u003cli\u003eSeries: Osram Decostar 51S\u003c\/li\u003e\n  \u003cli\u003eBase: GU5.3 (bi-pin, low voltage)\u003c\/li\u003e\n  \u003cli\u003eVoltage: 12 V (requires a transformer)\u003c\/li\u003e\n  \u003cli\u003ePower: 35 W\u003c\/li\u003e\n  \u003cli\u003eBeam angle: 36° (spotlight)\u003c\/li\u003e\n  \u003cli\u003eColor temperature: 2900 K (warm white, incandescent-like shade)\u003c\/li\u003e\n  \u003cli\u003eColor rendering index (CRI): Ra 100 (perfect)\u003c\/li\u003e\n  \u003cli\u003eLifetime: 4,000 hours\u003c\/li\u003e\n  \u003cli\u003eDimmable: Yes, 100%\u003c\/li\u003e\n  \u003cli\u003eSpecial features: Cold light mirror (−66% beam heat), UV filter\u003c\/li\u003e\n  \u003cli\u003eApproved for use in open luminaires (IEC 60598-1)\u003c\/li\u003e\n  \u003cli\u003eLamp construction: Decorative protective glass, mercury-free\u003c\/li\u003e\n  \u003cli\u003eDiameter: 51 mm\u003c\/li\u003e\n  \u003cli\u003eLength: 46 mm\u003c\/li\u003e\n  \u003cli\u003eProduct code: HC501203536\/02\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=\"https:\/\/www.lumenled.fi\/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 lamp's (or multiple lamps' total) power. For example, for one 35W lamp, the transformer must be at least 35W. For multiple lamps, calculate the total power and choose a transformer accordingly — it's often advisable to allow for a small reserve (e.g., two 35W lamps = 70W, choose an 80–105W transformer).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eGU5.3 base — bi-pin fitting\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eGU5.3 is a two-pin (Ø 5.3 mm) base that is inserted directly into the luminaire holder. Not to be confused with a GU10 base, which is bayonet-fitted and operates on 230V mains voltage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCold light mirror — cooler light beam\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Decostar 51S's dichroic mirror reflects visible light forward but allows infrared heat to pass through the mirror to the rear. This means that the \u003cstrong\u003eilluminated surface feels up to 66% less heat\u003c\/strong\u003e compared to a regular halogen lamp. Particularly useful in display cases, museums, art illumination, and food displays where heat can damage the objects.\u003c\/p\u003e\n\n\u003cp\u003eNote: the rear of the lamp still heats up — ensure the luminaire is designed to dissipate heat from the rear.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eUV filter — protects colors\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe UV filter blocks UV radiation, which would otherwise fade colors in artwork, textiles, and products. This makes the Decostar 51S an ideal choice for museums, galleries, clothing stores, and display cases.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe lamp is dimmable\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis Decostar 51S is 100% dimmable with compatible dimmers. Halogen lamp dimming is possible with both electronic and triac dimmers. Check that the transformer is dimmable if you want to adjust the light output.\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 GU5.3 base (not GU10)\u003c\/li\u003e\n  \u003cli\u003eCheck that a 12V transformer is used, with sufficient power for the total lamp power\u003c\/li\u003e\n  \u003cli\u003eCheck that the lamp dimensions (Ø51 × 46 mm) fit the luminaire\u003c\/li\u003e\n  \u003cli\u003eTurn off the power before installation — do not touch the lamp 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=\"https:\/\/www.lumenled.fi\/collections\/gu5-3-led-kohdelamput\"\u003eGU5.3 LED spotlight lamps\u003c\/a\u003e, which use approximately 80% less energy and last up to 25,000 hours. However, halogen retains its advantages with perfect CRI 100 color rendering, which is important for illuminating artwork and jewelry, for example.\u003c\/p\u003e\n\u003c\/details\u003e","brand":"Osram","offers":[{"title":"35W \/ GU5.3","offer_id":57104955081048,"sku":"HC501203536\/02","price":8.15,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0577\/2171\/6917\/files\/HC501202036-02.webp?v=1776160771","url":"https:\/\/www.lumenled.fi\/en\/products\/osram-decostar-51s-gu5-3-35w-12v","provider":"Lumenled Oy","version":"1.0","type":"link"}