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1.5W G4 COB LED Bulb - 2700K Warm White

£599
The RRP is the manufacturer's recommended retail price of the item.
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Minimum order for this item is 10.

Description

The Knightsbridge G4 COB LED bulb delivers 185 lumens at 1.5W on 12V AC or DC supply, producing 2700K warm white light through a clear silicone capsule. COB (Chip-On-Board) LED technology places multiple LED chips directly onto a single substrate, creating a single-source emitter rather than multiple visible points of light, which gives more even illumination and higher efficacy at 132 lumens per watt.

Designed for low-voltage under-cabinet lighting, display cases, desk lamps and accent lighting, the bulb fits any G4 bi-pin socket and operates on standard 12V AC transformers or DC drivers. The 36mm height and 10mm diameter capsule allows it to fit compact fittings where space behind the fascia is limited. The 270-degree beam angle provides wide light distribution without needing a reflector, making it suitable for open fixtures and exposed-bulb fittings.

The silicone body gives physical flexibility and tolerance to minor impacts compared to glass capsules, and the IP20 rating confirms suitability for dry indoor locations. The bulb is non-dimmable — attempting to dim it on an AC dimmer will cause flicker or failure. The rated L70B50 lifespan of 25,000 hours suggests the bulb will maintain at least 70% of its initial 185-lumen output for around three years of continuous operation, or ten years at typical residential usage patterns.

Specification
Diameter 10 mm
Height 36 mm
Construction Silicone
Class III
IP Rating IP20
Primary Voltage 12V AC/DC
Diffuser Clear
Lamp Technology CoB LED
Lamp Base G4
Dimmable No
L70B50 25000
Energy Rating (Class) post 2021 SLR E
Beam Angle 270
CCT 2700 K
Light Colour Warm White
Lumens 185 lm
Wattage 1.5
Efficacy 132.4 lm/W
CRI >80
Warranty 3
Downloads

Product Specification Sheet

Frequently Asked

Is this bulb dimmable?

No. The G4 COB LED is non-dimmable and will flicker or fail if used on a dimmer circuit. It requires a constant 12V AC or DC supply.

What voltage does it run on?

The bulb operates on 12V AC or 12V DC. It works with standard low-voltage halogen transformers rated for LED load, or dedicated 12V DC LED drivers. Check the transformer is rated for the combined wattage of all bulbs on the circuit.

How bright is 185 lumens?

185 lumens is roughly equivalent to a 15-20W halogen capsule bulb. It suits accent lighting, under-cabinet task lighting and decorative fixtures where ambient brightness is provided by other sources.

What is COB LED technology?

COB (Chip-On-Board) places multiple LED chips directly onto a single substrate, creating one continuous light-emitting surface rather than multiple visible points. This gives higher efficacy, more even light distribution and reduced shadowing compared to multi-chip LED designs.

Shipping & Returns

Free worldwide delivery

Free worldwide delivery on all orders over £99. International orders for third-party brand products may be subject to an additional courier surcharge based on volumetric weight, particularly on larger lighting fixtures — if a surcharge applies, our team will email you with the amount before dispatch and you can proceed or cancel for a full refund. See full delivery terms.

Returns

30-day returns window from delivery. As all our products are electrical or lighting goods, returned items must be inspected and recertified by a qualified electrician before resale — the cost of this inspection (25–40% of the item value) is deducted from your refund. Customers pay return shipping. Made-to-order, special-order and clearance items cannot be returned. See full returns policy.

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    Description

    The Knightsbridge G4 COB LED bulb delivers 185 lumens at 1.5W on 12V AC or DC supply, producing 2700K warm white light through a clear silicone capsule. COB (Chip-On-Board) LED technology places multiple LED chips directly onto a single substrate, creating a single-source emitter rather than multiple visible points of light, which gives more even illumination and higher efficacy at 132 lumens per watt.

    Designed for low-voltage under-cabinet lighting, display cases, desk lamps and accent lighting, the bulb fits any G4 bi-pin socket and operates on standard 12V AC transformers or DC drivers. The 36mm height and 10mm diameter capsule allows it to fit compact fittings where space behind the fascia is limited. The 270-degree beam angle provides wide light distribution without needing a reflector, making it suitable for open fixtures and exposed-bulb fittings.

    The silicone body gives physical flexibility and tolerance to minor impacts compared to glass capsules, and the IP20 rating confirms suitability for dry indoor locations. The bulb is non-dimmable — attempting to dim it on an AC dimmer will cause flicker or failure. The rated L70B50 lifespan of 25,000 hours suggests the bulb will maintain at least 70% of its initial 185-lumen output for around three years of continuous operation, or ten years at typical residential usage patterns.

    Specification
    Diameter 10 mm
    Height 36 mm
    Construction Silicone
    Class III
    IP Rating IP20
    Primary Voltage 12V AC/DC
    Diffuser Clear
    Lamp Technology CoB LED
    Lamp Base G4
    Dimmable No
    L70B50 25000
    Energy Rating (Class) post 2021 SLR E
    Beam Angle 270
    CCT 2700 K
    Light Colour Warm White
    Lumens 185 lm
    Wattage 1.5
    Efficacy 132.4 lm/W
    CRI >80
    Warranty 3
    Downloads

    Product Specification Sheet

    Frequently Asked

    Is this bulb dimmable?

    No. The G4 COB LED is non-dimmable and will flicker or fail if used on a dimmer circuit. It requires a constant 12V AC or DC supply.

    What voltage does it run on?

    The bulb operates on 12V AC or 12V DC. It works with standard low-voltage halogen transformers rated for LED load, or dedicated 12V DC LED drivers. Check the transformer is rated for the combined wattage of all bulbs on the circuit.

    How bright is 185 lumens?

    185 lumens is roughly equivalent to a 15-20W halogen capsule bulb. It suits accent lighting, under-cabinet task lighting and decorative fixtures where ambient brightness is provided by other sources.

    What is COB LED technology?

    COB (Chip-On-Board) places multiple LED chips directly onto a single substrate, creating one continuous light-emitting surface rather than multiple visible points. This gives higher efficacy, more even light distribution and reduced shadowing compared to multi-chip LED designs.

    Shipping & Returns

    Free worldwide delivery

    Free worldwide delivery on all orders over £99. International orders for third-party brand products may be subject to an additional courier surcharge based on volumetric weight, particularly on larger lighting fixtures — if a surcharge applies, our team will email you with the amount before dispatch and you can proceed or cancel for a full refund. See full delivery terms.

    Returns

    30-day returns window from delivery. As all our products are electrical or lighting goods, returned items must be inspected and recertified by a qualified electrician before resale — the cost of this inspection (25–40% of the item value) is deducted from your refund. Customers pay return shipping. Made-to-order, special-order and clearance items cannot be returned. See full returns policy.