{"product_id":"gu10-led-bulb-5w-cool-white-4000k-dimmable-74mm","title":"GU10 LED Bulb 5W Cool White 4000K Dimmable 74mm","description":"\u003c!-- v19.1 --\u003e\n\u003ch2 style=\"font-size: 16px; font-weight: 400; line-height: 1.8; margin: 0 0 8px 0; color: #121212;\"\u003eGU10 LED Bulb 5W 4000K Cool White 460lm Dimmable 74mm Extended Barrel — Integrated LED\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.8; margin: 0 0 28px 0; color: #121212;\"\u003eA dimmable GU10 LED bulb at 5W, 460 lumens, 4000K cool white, with a 90° wide beam and a 74mm extended barrel. Push-and-twist fit. Designed for deep recessed downlight fittings where a standard 58mm GU10 sits too far back. Rated for 25,000 hours. Integrated LED — no bulb to buy.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 11px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: #c9a84c; margin: 0 0 12px 0; padding-left: 12px; border-left: 2px solid #C9A84C;\"\u003eTechnical specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-bottom: 36px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom: 1px solid rgba(18,18,18,0.08);\"\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 13px; color: rgba(18,18,18,0.5); width: 48%;\"\u003eLight source\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 14px; font-weight: 500; color: #121212;\"\u003eIntegrated LED — fixed, non-replaceable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgba(18,18,18,0.08);\"\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 13px; color: rgba(18,18,18,0.5);\"\u003eCap type\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 14px; font-weight: 500; color: #121212;\"\u003eGU10 — push-and-twist\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgba(18,18,18,0.08);\"\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 13px; color: rgba(18,18,18,0.5);\"\u003eWattage\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 14px; font-weight: 500; color: #121212;\"\u003e5W — equivalent to 50W halogen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgba(18,18,18,0.08);\"\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 13px; color: rgba(18,18,18,0.5);\"\u003eLuminous flux\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 14px; font-weight: 500; color: #121212;\"\u003e460lm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgba(18,18,18,0.08);\"\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 13px; color: rgba(18,18,18,0.5);\"\u003eColour temperature\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 14px; font-weight: 500; color: #121212;\"\u003e4000K — cool white\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgba(18,18,18,0.08);\"\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 13px; color: rgba(18,18,18,0.5);\"\u003eBeam angle\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 14px; font-weight: 500; color: #121212;\"\u003e90° — wide flood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgba(18,18,18,0.08);\"\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 13px; color: rgba(18,18,18,0.5);\"\u003eDimmable\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 14px; font-weight: 500; color: #121212;\"\u003eYes — trailing edge (LED) dimmer required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgba(18,18,18,0.08);\"\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 13px; color: rgba(18,18,18,0.5);\"\u003eBarrel length\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 14px; font-weight: 500; color: #121212;\"\u003e74mm — extended (standard = 58mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgba(18,18,18,0.08);\"\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 13px; color: rgba(18,18,18,0.5);\"\u003eDiameter\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 14px; font-weight: 500; color: #121212;\"\u003eø50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgba(18,18,18,0.08);\"\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 13px; color: rgba(18,18,18,0.5);\"\u003eVoltage\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 14px; font-weight: 500; color: #121212;\"\u003e240V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgba(18,18,18,0.08);\"\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 13px; color: rgba(18,18,18,0.5);\"\u003eLifetime\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 14px; font-weight: 500; color: #121212;\"\u003e25,000 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid rgba(18,18,18,0.08);\"\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 13px; color: rgba(18,18,18,0.5);\"\u003eEnergy rating\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 0; font-size: 14px; font-weight: 500; color: #121212;\"\u003eA+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"font-size: 11px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: #c9a84c; margin: 0 0 16px 0; padding-left: 12px; border-left: 2px solid #C9A84C;\"\u003eGU10 LED Bulb 74mm — Extended Barrel, Dimmable, Deep Downlight Fit\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.8; margin: 0 0 16px 0; color: #121212;\"\u003eStandard GU10 bulbs measure approximately 58mm in height. This bulb has a 74mm extended barrel — designed for deep recessed downlight fittings where a standard bulb sits too far back inside the housing, causing uneven light distribution or a visible dark ring around the beam. If your downlight has a deep housing and a standard GU10 produces a shadowed or uneven result, this extended barrel format is the correct solution. At 460lm from 5W, output is slightly lower than a standard 5W GU10 (typically 500–600lm) — a result of the extended barrel geometry. The 4000K cool white tone is neutral and clear, suited to kitchens, bathrooms, and task areas. Dimmable — use a trailing edge (LED-compatible) dimmer switch. Standard leading edge dimmers may cause flickering. If you are not using a dimmer switch at all, a non-dimmable GU10 alternative may perform more consistently.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.8; margin: 0 0 36px 0; color: #121212;\"\u003eBefore ordering, measure the depth of your downlight housing to confirm the 74mm barrel fits without obstruction. Confirm the cap type is GU10 (push-and-twist). Browse the full \u003ca style=\"color: #121212; font-weight: 700;\" href=\"https:\/\/lighting-dublin.com\/collections\/led-bulbs\"\u003eLED bulbs collection\u003c\/a\u003e or read our \u003ca style=\"color: #121212; font-weight: 700;\" href=\"https:\/\/lighting-dublin.com\/blogs\/news\/how-to-choose-indoor-lighting\"\u003eindoor lighting guide\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3 style=\"font-size: 11px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: #c9a84c; margin: 0 0 4px 0; padding-left: 12px; border-left: 2px solid #C9A84C;\"\u003eCommon questions\u003c\/h3\u003e\n\u003cdetails style=\"border-bottom: 1px solid rgba(18,18,18,0.08); padding: 16px 0;\" class=\"ld-faq\"\u003e\n\u003csummary style=\"cursor: pointer; display: flex; justify-content: space-between; align-items: flex-start; list-style: none;\"\u003e\u003ch4 style=\"margin: 0; font-size: 14px; font-weight: 500; color: #121212; display: inline;\"\u003eWhy does this bulb have a longer barrel than standard GU10s?\u003c\/h4\u003e\n\u003cspan style=\"font-size: 20px; font-weight: 300; color: #c9a84c; flex-shrink: 0; margin-left: 12px;\"\u003e+\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 4px 0; font-size: 14px; line-height: 1.8; color: rgba(18,18,18,0.65);\"\u003eThis bulb has a 74mm barrel versus the standard 58mm. It is designed for deep recessed downlight fittings where a standard bulb sits too far back inside the housing, causing uneven light distribution or a visible dark ring. If your downlight has a deep housing, this extended barrel ensures the bulb sits at the correct depth. Measure your housing depth before ordering to confirm compatibility.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border-bottom: 1px solid rgba(18,18,18,0.08); padding: 16px 0;\" class=\"ld-faq\"\u003e\n\u003csummary style=\"cursor: pointer; display: flex; justify-content: space-between; align-items: flex-start; list-style: none;\"\u003e\u003ch4 style=\"margin: 0; font-size: 14px; font-weight: 500; color: #121212; display: inline;\"\u003eCan this be dimmed, and what dimmer switch do I need?\u003c\/h4\u003e\n\u003cspan style=\"font-size: 20px; font-weight: 300; color: #c9a84c; flex-shrink: 0; margin-left: 12px;\"\u003e+\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 4px 0; font-size: 14px; line-height: 1.8; color: rgba(18,18,18,0.65);\"\u003eYes — this bulb is dimmable. Use a trailing edge (LED-compatible) dimmer switch for best results. Standard leading edge dimmers may cause flickering or buzzing. Trailing edge dimmers are usually labelled TE or LED on the switch plate. If you are not using a dimmer switch at all, a non-dimmable GU10 alternative may perform more consistently — contact us for advice.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border-bottom: 1px solid rgba(18,18,18,0.08); padding: 16px 0;\" class=\"ld-faq\"\u003e\n\u003csummary style=\"cursor: pointer; display: flex; justify-content: space-between; align-items: flex-start; list-style: none;\"\u003e\u003ch4 style=\"margin: 0; font-size: 14px; font-weight: 500; color: #121212; display: inline;\"\u003eWhich fittings does this work with?\u003c\/h4\u003e\n\u003cspan style=\"font-size: 20px; font-weight: 300; color: #c9a84c; flex-shrink: 0; margin-left: 12px;\"\u003e+\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 4px 0; font-size: 14px; line-height: 1.8; color: rgba(18,18,18,0.65);\"\u003eDesigned for GU10 (push-and-twist) deep recessed downlight fittings. Before ordering, confirm both the cap type (GU10) and the housing depth (minimum 74mm clearance). This bulb produces 4000K cool white — a clear, neutral tone suited to kitchens, bathrooms, and task areas. Browse our \u003ca style=\"color: #121212; font-weight: 700;\" href=\"https:\/\/lighting-dublin.com\/collections\/led-bulbs\"\u003eLED bulbs collection\u003c\/a\u003e for other colour temperatures and barrel lengths.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border-bottom: 1px solid rgba(18,18,18,0.08); padding: 16px 0;\" class=\"ld-faq\"\u003e\n\u003csummary style=\"cursor: pointer; display: flex; justify-content: space-between; align-items: flex-start; list-style: none;\"\u003e\u003ch4 style=\"margin: 0; font-size: 14px; font-weight: 500; color: #121212; display: inline;\"\u003eIs 4000K cool white suitable for a living room or bedroom?\u003c\/h4\u003e\n\u003cspan style=\"font-size: 20px; font-weight: 300; color: #c9a84c; flex-shrink: 0; margin-left: 12px;\"\u003e+\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 4px 0; font-size: 14px; line-height: 1.8; color: rgba(18,18,18,0.65);\"\u003e4000K cool white will feel clinical in a living room or bedroom — it is not the right choice for atmospheric or relaxation lighting. For those spaces, 2700K extra warm white or 3000K warm white is more appropriate. 4000K is best suited to kitchens, bathrooms, home offices, and task areas where visual clarity matters more than ambience.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border-bottom: none; padding: 16px 0;\" class=\"ld-faq\"\u003e\n\u003csummary style=\"cursor: pointer; display: flex; justify-content: space-between; align-items: flex-start; list-style: none;\"\u003e\u003ch4 style=\"margin: 0; font-size: 14px; font-weight: 500; color: #121212; display: inline;\"\u003eWhy is the lumen output lower than a standard 5W GU10?\u003c\/h4\u003e\n\u003cspan style=\"font-size: 20px; font-weight: 300; color: #c9a84c; flex-shrink: 0; margin-left: 12px;\"\u003e+\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 4px 0; font-size: 14px; line-height: 1.8; color: rgba(18,18,18,0.65);\"\u003eThis bulb delivers 460lm versus the 500–600lm typical of a standard 5W GU10. The extended 74mm barrel geometry affects the optical path, which results in slightly lower measured lumen output. In practice, the difference is not perceptible in normal use — the extended barrel ensures the bulb sits at the correct depth in a deep housing, which produces better light distribution than a standard bulb sitting too far back.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cp style=\"font-size: 13px; color: rgba(18,18,18,0.45); border-top: 1px solid rgba(18,18,18,0.08); padding-top: 20px; line-height: 1.8; margin: 0;\"\u003eBrowse the full \u003ca style=\"color: #121212; font-weight: 700;\" href=\"https:\/\/lighting-dublin.com\/collections\/led-bulbs\"\u003eLED Bulbs collection\u003c\/a\u003e · Read our \u003ca style=\"color: #121212; font-weight: 700;\" href=\"https:\/\/lighting-dublin.com\/blogs\/news\/how-to-choose-indoor-lighting\"\u003eindoor lighting guide\u003c\/a\u003e · \u003ca style=\"color: #121212; font-weight: 700;\" href=\"https:\/\/lighting-dublin.com\/policies\/shipping-policy\"\u003eShipping policy\u003c\/a\u003e · \u003ca style=\"color: #121212; font-weight: 700;\" href=\"https:\/\/lighting-dublin.com\/policies\/refund-policy\"\u003eReturns policy\u003c\/a\u003e — Free delivery on orders over €50.\u003c\/p\u003e","brand":"Lighting Dublin","offers":[{"title":"Default Title","offer_id":50000351527149,"sku":"141580","price":5.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0789\/4600\/9325\/files\/141510_357041e9-b355-4cd7-b0ba-ba8f6724e894.png?v=1779407748","url":"https:\/\/lighting-dublin.com\/products\/gu10-led-bulb-5w-cool-white-4000k-dimmable-74mm","provider":"Lighting Dublin","version":"1.0","type":"link"}