Vintage Spiral Filament Tube Bulb T45 E27 40W — Cool White 6000K, 220V
T45 tubular filament bulb with a decorative spiral LED filament, E27 screw cap, 40W, and a crisp cool white light at 6000K. The spiral filament inside the elongated T45 tube creates a striking visual pattern — designed for industrial and contemporary fittings where a cooler, more energising light is preferred. Bulb included.
Technical specifications
| Light source | Integrated LED filament — non-replaceable |
| Bulb shape | T45 (tubular / elongated, clear glass) |
| Filament style | Spiral / helix |
| Cap type | E27 (large screw) |
| Wattage | 40W |
| Colour temperature | 6000K cool white |
| Voltage | 220–240V (standard mains) |
| Rated lifespan | 50,000 hours |
| Dimmable | Verify before ordering if you have a dimmer switch |
| IP rating | IP20 — dry indoor use only |
| Certifications | CE |
T45 Spiral Cool White — Industrial character, cool light & where it works
This is the cool white variant of the T45 spiral filament — an unusual combination that suits a specific type of interior: industrial kitchens, home offices with exposed pendant lighting, retail displays, and contemporary loft spaces where a crisp, energising light is preferred over the amber warmth of a traditional filament bulb. At 6000K, the light is noticeably blue-toned and bright — it improves visibility and focus, making it more functional than decorative. The spiral filament remains fully visible through the clear T45 glass, adding a visual layer of interest even in a cool white fitting. The elongated tubular shape suits horizontal bar pendants, multi-arm wall lights, and industrial ceiling fittings where the bulb silhouette is part of the design language. At 40W, the output is moderate — suitable as a primary source in smaller spaces or as part of a multi-bulb arrangement in larger rooms.
Direct E27 screw-in replacement — no tools or rewiring required. Rated at 50,000 hours. IP20 — dry indoor use only. Check dimmability before ordering if your fitting has a dimmer switch. Explore our full Light Bulbs range or read our interior lighting tips for advice on mixing filament styles and colour temperatures.
Common questions
Why choose cool white in a filament bulb — isn’t warm white the standard?
+
Warm white is the most common choice for filament bulbs, but cool white (6000K) has a specific use case: spaces where you want the decorative filament aesthetic combined with a brighter, more functional light. Industrial kitchens, home offices with pendant lighting, and retail displays often benefit from the clarity of cool white without sacrificing the visual interest of a visible filament. If you want the classic warm amber glow, choose the warm white T45 variant instead.
How does 6000K cool white look compared to daylight?
+
6000K is at the cooler end of the daylight range — it produces a crisp, blue-toned white light similar to overcast daylight. It is noticeably cooler than the 4000K “neutral white” used in many offices, and significantly cooler than the 2700–3000K warm white of most filament bulbs. In a room with warm-toned walls or wood finishes, 6000K can feel stark; in a space with white walls, concrete, or metal surfaces, it reads as clean and contemporary.
Can I mix this cool white T45 with warm white bulbs in the same room?
+
Mixing colour temperatures in the same room is generally not recommended — the contrast between 6000K and 2700K is significant and will look mismatched. If you want to use this bulb alongside other filament bulbs, ensure all bulbs in the same fitting or zone use the same colour temperature. Mixing is more acceptable across separate zones (e.g. cool white task lighting over a kitchen island, warm white ambient lighting in the dining area).
Is the T45 tube shape suitable for a bar-style pendant over a kitchen island?
+
Yes — the T45 is one of the best choices for bar-style and linear pendants over kitchen islands. The elongated tubular shape aligns naturally with horizontal fittings, and the cool white light at 6000K provides the functional brightness needed for food preparation. Ensure the fitting’s sockets are E27 and that the total wattage does not exceed the fitting’s rated maximum.
Does the spiral filament affect the light distribution at 6000K?
+
No — the spiral filament is omnidirectional and distributes light evenly in all directions, regardless of colour temperature. At 6000K, the light will appear brighter and more uniform than at 2700K due to the higher colour temperature, but the distribution pattern is the same. There are no directional hotspots or shadows from the spiral shape.
Explore our full Light Bulbs collection or read our interior lighting tips. Free delivery on orders over €50 — easy returns if it’s not the right fit.
