{"product_id":"diamond-filament-bulb-e27-40w-tungsten-2700k-vintage","title":"Diamond Filament Bulb E27 40W Tungsten 2700K Vintage Edison","description":"\u003c!-- v19.1 --\u003e\n\n\u003ch2 style=\"font-size:16px;font-weight:400;line-height:1.8;margin:0 0 8px 0;color:#121212;\"\u003eDiamond Filament Bulb E27 40W Tungsten — 2700K Authentic Incandescent, Faceted Glass Body\u003c\/h2\u003e\n\n\u003cp style=\"font-size:15px;line-height:1.8;margin:0 0 28px 0;color:#121212;\"\u003eA vintage incandescent bulb with a faceted diamond-shaped glass body and a classic straight tungsten filament, delivering a deep 2700K amber tone at 40W. E27 cap, standard EU\/UK mains (220–240V). CE, RoHS and CCC certified. Bulb sold individually — fitting not included.\u003c\/p\u003e\n\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;\"\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;\"\u003eIncandescent tungsten filament — 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 \/ Socket\u003c\/td\u003e\n      \u003ctd style=\"padding:12px 0;font-size:14px;font-weight:500;color:#121212;\"\u003eE27 (standard Edison screw) — also fits E26\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);\"\u003eBulb shape\u003c\/td\u003e\n      \u003ctd style=\"padding:12px 0;font-size:14px;font-weight:500;color:#121212;\"\u003eDiamond — faceted geometric glass body\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);\"\u003eFilament type\u003c\/td\u003e\n      \u003ctd style=\"padding:12px 0;font-size:14px;font-weight:500;color:#121212;\"\u003eStraight tungsten — classic Edison style\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;\"\u003e40W\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;\"\u003e2700K — extra warm amber\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;\"\u003e220–240V \/ 50Hz\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);\"\u003eGlass\u003c\/td\u003e\n      \u003ctd style=\"padding:12px 0;font-size:14px;font-weight:500;color:#121212;\"\u003eClear — faceted diamond body\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 — compatible with standard incandescent dimmers\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);\"\u003eCertifications\u003c\/td\u003e\n      \u003ctd style=\"padding:12px 0;font-size:14px;font-weight:500;color:#121212;\"\u003eCE (EU \/ UK), RoHS, CCC\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\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;\"\u003eDiamond Tungsten — Geometric Precision, Prismatic Refraction, Authentic Glow\u003c\/h3\u003e\n\n\u003cp style=\"font-size:15px;line-height:1.8;margin:0 0 16px 0;color:#121212;\"\u003eThe diamond shape and the tungsten filament are two separate arguments for this bulb, and they work differently. The faceted glass body is a geometric statement — precise, angular, and visually distinct from the rounded profiles of most vintage bulbs. Each flat face of the diamond refracts the filament glow at a different angle, casting subtle prismatic reflections on surrounding surfaces that shift as you move around the fitting. The tungsten filament is the other argument: a single straight wire that glows at a colour temperature no LED can fully replicate — genuine 2700K amber, with the slight flicker and warmth that comes from a real incandescent source. Together, the two elements produce a bulb that is simultaneously a precision object and an authentic light source. At 40W, the output is noticeably brighter than the 4W LED version of the same shape — enough for a pendant over a dining table or a statement floor lamp, not just a bedside accent. It dims smoothly with a standard incandescent dimmer, and the colour temperature deepens further as the output drops.\u003c\/p\u003e\n\n\u003cp style=\"font-size:15px;line-height:1.8;margin:0 0 36px 0;color:#121212;\"\u003eThis bulb is best used in open or clear-glass fittings where both the diamond silhouette and the straight filament are fully visible. The prismatic refraction effect is most pronounced in darker rooms and at lower dimmer settings. In a multi-bulb fitting, the faceted faces of adjacent diamond bulbs interact with each other’s light, creating a layered reflection pattern that a smooth globe cannot produce. Browse our \u003ca href=\"https:\/\/lighting-dublin.com\/collections\/pendant-lights\" style=\"color:#121212;font-weight:700;\"\u003ependant lights collection\u003c\/a\u003e for compatible open fittings, or read our \u003ca href=\"https:\/\/lighting-dublin.com\/blogs\/news\/lamps-dublin\" style=\"color:#121212;font-weight:700;\"\u003elamps guide\u003c\/a\u003e for advice on pairing decorative bulbs with the right fitting.\u003c\/p\u003e\n\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\n\u003cdetails class=\"ld-faq\" style=\"border-bottom:1px solid rgba(18,18,18,0.08);padding:14px 0;\"\u003e\n  \u003csummary style=\"display:flex;justify-content:space-between;align-items:center;cursor:pointer;list-style:none;\"\u003e\n    \u003ch4 style=\"font-size:14px;font-weight:600;color:#121212;margin:0;\"\u003eWhat is the difference between this 40W tungsten version and the 4W LED diamond bulb?\u003c\/h4\u003e\n    \u003cspan style=\"color:#C9A84C;font-size:18px;font-weight:300;\"\u003e+\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cp style=\"font-size:14px;line-height:1.8;color:rgba(18,18,18,0.65);margin:10px 0 0 0;\"\u003eBoth have the same faceted diamond glass body, but the light source differs significantly. This 40W version uses a real tungsten filament — a single straight wire that produces authentic incandescent light at 2700K, with the warmth, slight flicker, and colour rendering that only tungsten delivers. It is also noticeably brighter. The 4W LED version uses a spiral LED filament, consumes 90% less energy, and has a much longer lifespan, but the light quality is slightly different. Choose tungsten for authenticity and brightness; choose LED for efficiency and longevity.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"ld-faq\" style=\"border-bottom:1px solid rgba(18,18,18,0.08);padding:14px 0;\"\u003e\n  \u003csummary style=\"display:flex;justify-content:space-between;align-items:center;cursor:pointer;list-style:none;\"\u003e\n    \u003ch4 style=\"font-size:14px;font-weight:600;color:#121212;margin:0;\"\u003eDoes the faceted glass get hot to the touch?\u003c\/h4\u003e\n    \u003cspan style=\"color:#C9A84C;font-size:18px;font-weight:300;\"\u003e+\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cp style=\"font-size:14px;line-height:1.8;color:rgba(18,18,18,0.65);margin:10px 0 0 0;\"\u003eYes — as a 40W incandescent, this bulb generates significant heat during operation. The glass surface will become hot and should not be touched while the bulb is on or immediately after switching off. Ensure the fitting you use is rated for at least 40W and that there is adequate clearance around the bulb. Do not use in enclosed fittings that trap heat, and keep away from flammable materials.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"ld-faq\" style=\"border-bottom:1px solid rgba(18,18,18,0.08);padding:14px 0;\"\u003e\n  \u003csummary style=\"display:flex;justify-content:space-between;align-items:center;cursor:pointer;list-style:none;\"\u003e\n    \u003ch4 style=\"font-size:14px;font-weight:600;color:#121212;margin:0;\"\u003eIs the prismatic refraction effect visible in a well-lit room?\u003c\/h4\u003e\n    \u003cspan style=\"color:#C9A84C;font-size:18px;font-weight:300;\"\u003e+\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cp style=\"font-size:14px;line-height:1.8;color:rgba(18,18,18,0.65);margin:10px 0 0 0;\"\u003eThe refraction effect is most visible in low-light conditions — in the evening, in a dimmed room, or when the bulb is the primary light source. In a brightly lit space with multiple light sources, the prismatic reflections are less noticeable but the diamond silhouette remains visually distinctive. For the full effect, use this bulb as the centrepiece of a fitting in a room where you can control the ambient light level.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"ld-faq\" style=\"border-bottom:1px solid rgba(18,18,18,0.08);padding:14px 0;\"\u003e\n  \u003csummary style=\"display:flex;justify-content:space-between;align-items:center;cursor:pointer;list-style:none;\"\u003e\n    \u003ch4 style=\"font-size:14px;font-weight:600;color:#121212;margin:0;\"\u003eCan I use this in a fitting rated for 25W or 40W maximum?\u003c\/h4\u003e\n    \u003cspan style=\"color:#C9A84C;font-size:18px;font-weight:300;\"\u003e+\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cp style=\"font-size:14px;line-height:1.8;color:rgba(18,18,18,0.65);margin:10px 0 0 0;\"\u003eOnly if the fitting is rated for 40W or above. Using a 40W bulb in a fitting rated for 25W maximum creates a fire risk due to excess heat. Always check the maximum wattage rating on your fitting — it is usually printed on a label near the socket. If your fitting is rated for 25W, use the 4W LED version of this bulb instead, which produces far less heat and is safe in lower-rated fittings.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"ld-faq\" style=\"border-bottom:1px solid rgba(18,18,18,0.08);padding:14px 0;\"\u003e\n  \u003csummary style=\"display:flex;justify-content:space-between;align-items:center;cursor:pointer;list-style:none;\"\u003e\n    \u003ch4 style=\"font-size:14px;font-weight:600;color:#121212;margin:0;\"\u003eHow long will a 40W tungsten bulb last compared to an LED?\u003c\/h4\u003e\n    \u003cspan style=\"color:#C9A84C;font-size:18px;font-weight:300;\"\u003e+\u003c\/span\u003e\n  \u003c\/summary\u003e\n  \u003cp style=\"font-size:14px;line-height:1.8;color:rgba(18,18,18,0.65);margin:10px 0 0 0;\"\u003eA standard 40W tungsten incandescent typically lasts 1 000–2 000 hours — roughly 9 months to 1.5 years at 4 hours of daily use. An LED equivalent in the same diamond shape is rated for 50 000 hours, or over 34 years at the same usage rate. The tungsten version requires more frequent replacement and consumes more energy, but delivers a light quality and authenticity that many people prefer for decorative applications. Factor in the replacement cost when comparing the two options.\u003c\/p\u003e\n\u003c\/details\u003e\n\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;\"\u003e\n  Find compatible open fittings in our \u003ca href=\"https:\/\/lighting-dublin.com\/collections\/pendant-lights\" style=\"color:#121212;font-weight:700;text-decoration:underline;text-underline-offset:3px;\"\u003ePendant Lights\u003c\/a\u003e or \u003ca href=\"https:\/\/lighting-dublin.com\/collections\/floor-lamps\" style=\"color:#121212;font-weight:700;text-decoration:underline;text-underline-offset:3px;\"\u003eFloor Lamps\u003c\/a\u003e collection. \u003ca href=\"https:\/\/lighting-dublin.com\/policies\/shipping-policy\" style=\"color:#121212;font-weight:700;text-decoration:underline;text-underline-offset:3px;\"\u003eFree delivery on orders over €50.\u003c\/a\u003e \u003ca href=\"https:\/\/lighting-dublin.com\/policies\/refund-policy\" style=\"color:#121212;font-weight:700;text-decoration:underline;text-underline-offset:3px;\"\u003e30-day returns.\u003c\/a\u003e\n\u003c\/p\u003e","brand":"Lighting Dublin","offers":[{"title":"Default Title","offer_id":50075419705581,"sku":"32881497137-40W Tungsten","price":26.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0789\/4600\/9325\/files\/S6451b6b73b5d4d8ea315dba5310dbafd9.jpg?v=1780732720","url":"https:\/\/lighting-dublin.com\/products\/diamond-filament-bulb-e27-40w-tungsten-2700k-vintage","provider":"Lighting Dublin","version":"1.0","type":"link"}