B15 LED Bulbs (Small Bayonet)

Browse our versatile B15 bulb range for the ideal low energy upgrade to your domestic or workplace lighting requirements. Our stylish B15 LED bulb options offer a choice of lumens (light intensity) across the colour temperature scale (cool white, daylight, warm white), allowing you to explore home lighting options from warmer low-intensity lighting to more clinical and practical midday lighting.

Check out our mid-lumen range B15 bulbs to replace your 40W Halogen bulbs. Or perhaps you’re looking for a B15 bulb with a warmer glow to illuminate those cosy living spaces. You may also wish to explore our dimmable B15 bulb options - ensure you upgrade to LED dimmer switches for best results with dimmable bulbs (standard switches may deliver mixed results).

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Key Features
  • Beam Angle - 220º
  • Dimmable
  • Energy Rating A+
  • H101mm x W35mm x D35mm
  • Replaces 40W Halogen Bulb
  • Up To 25000 Hours Life Expectancy
£2.69
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Key Features
  • Beam Angle - 220º
  • Dimmable
  • Energy Rating A+
  • H101mm x W35mm x D35mm
  • Replaces 40W Halogen Bulb
  • Up To 25000 Hours Life Expectancy
£2.69
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Key Features
  • Beam Angle - 220º
  • Dimmable
  • Energy Rating A+
  • H101mm x W35mm x D35mm
  • Replaces 40W Halogen Bulb
  • Up To 25000 Hours Life Expectancy
£2.69
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Key Features
  • Beam Angle - 150º
  • Energy Rating A+
  • H110mm x W37mm x D37mm
  • Non Dimmable
  • Replaces 40W Halogen Bulb
  • Up To 10000 Hours Life Expectancy
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Key Features
  • Beam Angle - 150º
  • Energy Rating A+
  • H110mm x W37mm x D37mm
  • Non Dimmable
  • Replaces 40W Halogen Bulb
  • Up To 10000 Hours Life Expectancy
Sold Out
Quick View
Key Features
  • Beam Angle - 150º
  • Energy Rating A+
  • H110mm x W37mm x D37mm
  • Non Dimmable
  • Replaces 40W Halogen Bulb
  • Up To 10000 Hours Life Expectancy
Sold Out
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Key Features
  • Beam Angle - 240º
  • Energy Rating A+
  • H110mm x W38mm x D38mm
  • Non Dimmable
  • Replaces 40W Halogen Bulb
  • Up To 15000 Hours Life Expectancy
£1.99
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Key Features
  • Beam Angle - 240º
  • Energy Rating A+
  • H110mm x W38mm x D38mm
  • Non Dimmable
  • Replaces 40W Halogen Bulb
  • Up To 15000 Hours Life Expectancy
Sold Out
Quick View
Key Features
  • Beam Angle - 240º
  • Dimmable
  • Energy Rating A+
  • H110mm x W38mm x D38mm
  • Replaces 40W Halogen Bulb
  • Up To 15000 Hours Life Expectancy
£4.79
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Key Features
  • Beam Angle - 240º
  • Dimmable
  • Energy Rating A+
  • H77mm x W45mm x D45mm
  • Replaces 40W Halogen Bulb
  • Up To 25000 Hours Life Expectancy
£2.69
Quick View
Key Features
  • Beam Angle - 240º
  • Dimmable
  • Energy Rating A+
  • H77mm x W45mm x D45mm
  • Replaces 40W Halogen Bulb
  • Up To 25000 Hours Life Expectancy
£2.69
Quick View
Key Features
  • Beam Angle - 240º
  • Dimmable
  • Energy Rating A+
  • H77mm x W45mm x D45mm
  • Replaces 40W Halogen Bulb
  • Up To 25000 Hours Life Expectancy
£2.69
Quick View
Key Features
  • Beam Angle - 120º
  • Energy Rating A+
  • H78mm x W45mm x D45mm
  • Non Dimmable
  • Replaces 40W Halogen Bulb
  • Up To 10000 Hours Life Expectancy
Sold Out
Quick View
Key Features
  • Beam Angle - 120º
  • Energy Rating A+
  • H78mm x W45mm x D45mm
  • Non Dimmable
  • Replaces 40W Halogen Bulb
  • Up To 10000 Hours Life Expectancy
£1.89
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Key Features
  • Beam Angle - 140º
  • Energy Rating A+
  • H87mm x W45mm x D45mm
  • Non Dimmable
  • Replaces 40W Halogen Bulb
  • Up To 15000 Hours Life Expectancy
£2.39
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What is a B15 bulb?

The base of a bulb is called the cap. Depending on the fittings in your home, you may require one of several main cap fittings, including Edison Screw (ES) and Bayonet (B). Home fittings designed to accommodate classic ‘push and twist’ bulbs require Bayonet caps. Depending on the diameter of the fitting in millimetres, you may need either a B15 bulb (Bayonet style cap with a 15 mm diameter) or a B22 bulb (Bayonet style cap with a 22mm diameter). Because B15 bulb caps are smaller in size than B22 caps, the term Small Bayonet Cap (SBC) is sometimes used.

Why choose a B15 LED bulb?

Our popular choice of B15 LED bulbs not only offers low wattage and environmentally friendly home lighting, but LED technology is also efficient in terms of lifespan. Older candescent bulbs typically deliver a lifespan of around 1,000 hours (or about 42 days of continuous use). In comparison, our advanced B15 LED bulb options deliver a lifespan of 10,000 - 20,000 hours or more, which represents almost a thousand days of continuous use (some LED bulbs can last up to 50,000 hours).