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Knightsbridge Lumina Retrofit LED Module 10/12W - Selectable CCT 3000K/4000K/5500K

£1399
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Description

The Knightsbridge Lumina is a retrofit LED module designed to replace GU10 bulbs in open-back downlights, offering selectable wattage (10W or 12W) and three colour temperatures (3000K warm white, 4000K neutral white, 5500K daylight). The module is milled from a single block of aluminium with a white polycarbonate prismatic diffuser, combining heat dissipation with a 40-degree beam angle for directional accent or task lighting.

Designed for residential and commercial downlight installations where GU10 bulbs previously limited output or longevity, the Lumina connects via a plug-and-play constant-current driver with loop-in-loop-out capability, allowing multiple modules to be daisy-chained from a single driver feed. The module measures 50mm diameter by 70mm height and sits within the downlight housing, with the driver positioned remotely in the ceiling void. The selectable wattage and CCT switches on the module allow the installer to configure light output and colour on-site without needing multiple SKUs.

The aluminium construction provides thermal management that extends the L70B50 rated life to 35,000 hours (approximately 12 years at 8 hours per day). The CRI >90 rating delivers accurate colour rendering for retail displays, art lighting, and hospitality interiors where colour fidelity matters. The module is dimmable when paired with trailing-edge dimmers (compatibility should be verified before installation), and an emergency backup option is available separately. Class II double-insulated construction eliminates the need for earthing, and the IP20 rating suits dry indoor environments.

Specification
Diameter 50 mm
Height 70 mm
Construction Aluminium
Construction 2 & polycarbonate
Finish White
Class II
IP Rating IP20
Primary Voltage 230V 50Hz
Diffuser Prismatic
Lamp Technology SMD LED
Lamp Included Yes
Dimmable Trailing-edge only*
L70B50 35000
Energy Rating (Class) post 2021 SLR D
Beam Angle 40
CCT 3000/4000/5500 K
Light Colour CCT
Lumens 800/890/890, 1000/1055/1025 lm
Lumens (Light Source only) 915/1050/1010, 1090/1250/1200 lm
Wattage 45636
Efficacy 98/118/108, 92/112/101 lm/W
CRI >90
Driver Type Constant Current
Warranty 5
Downloads

Product Specification Sheet

Product Manual

Frequently Asked

Is the Lumina compatible with all downlights?

The Lumina is designed for open-back downlights only. Closed-back or thermally-insulated downlights may restrict airflow and cause overheating. Check the existing downlight housing before installation and confirm it allows heat dissipation from the rear of the module.

How do I select the wattage and colour temperature?

The module has two switches accessible on the body: one for wattage (10W or 12W) and one for CCT (3000K, 4000K, or 5500K). These are set during installation before the driver is connected. Once configured, the settings remain fixed unless physically adjusted.

Can the Lumina be dimmed?

Yes, but only with trailing-edge dimmers. Leading-edge dimmers are not compatible and may cause flicker or failure. Verify dimmer compatibility with Knightsbridge's compatibility list before installation.

What is L70B50 and what does 35,000 hours mean?

L70B50 is a lifetime rating meaning that after 35,000 hours of operation, 50% of modules in a batch will still produce at least 70% of their original lumen output. At 8 hours per day, 35,000 hours equates to approximately 12 years of use.

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 Lumina is a retrofit LED module designed to replace GU10 bulbs in open-back downlights, offering selectable wattage (10W or 12W) and three colour temperatures (3000K warm white, 4000K neutral white, 5500K daylight). The module is milled from a single block of aluminium with a white polycarbonate prismatic diffuser, combining heat dissipation with a 40-degree beam angle for directional accent or task lighting.

    Designed for residential and commercial downlight installations where GU10 bulbs previously limited output or longevity, the Lumina connects via a plug-and-play constant-current driver with loop-in-loop-out capability, allowing multiple modules to be daisy-chained from a single driver feed. The module measures 50mm diameter by 70mm height and sits within the downlight housing, with the driver positioned remotely in the ceiling void. The selectable wattage and CCT switches on the module allow the installer to configure light output and colour on-site without needing multiple SKUs.

    The aluminium construction provides thermal management that extends the L70B50 rated life to 35,000 hours (approximately 12 years at 8 hours per day). The CRI >90 rating delivers accurate colour rendering for retail displays, art lighting, and hospitality interiors where colour fidelity matters. The module is dimmable when paired with trailing-edge dimmers (compatibility should be verified before installation), and an emergency backup option is available separately. Class II double-insulated construction eliminates the need for earthing, and the IP20 rating suits dry indoor environments.

    Specification
    Diameter 50 mm
    Height 70 mm
    Construction Aluminium
    Construction 2 & polycarbonate
    Finish White
    Class II
    IP Rating IP20
    Primary Voltage 230V 50Hz
    Diffuser Prismatic
    Lamp Technology SMD LED
    Lamp Included Yes
    Dimmable Trailing-edge only*
    L70B50 35000
    Energy Rating (Class) post 2021 SLR D
    Beam Angle 40
    CCT 3000/4000/5500 K
    Light Colour CCT
    Lumens 800/890/890, 1000/1055/1025 lm
    Lumens (Light Source only) 915/1050/1010, 1090/1250/1200 lm
    Wattage 45636
    Efficacy 98/118/108, 92/112/101 lm/W
    CRI >90
    Driver Type Constant Current
    Warranty 5
    Downloads

    Product Specification Sheet

    Product Manual

    Frequently Asked

    Is the Lumina compatible with all downlights?

    The Lumina is designed for open-back downlights only. Closed-back or thermally-insulated downlights may restrict airflow and cause overheating. Check the existing downlight housing before installation and confirm it allows heat dissipation from the rear of the module.

    How do I select the wattage and colour temperature?

    The module has two switches accessible on the body: one for wattage (10W or 12W) and one for CCT (3000K, 4000K, or 5500K). These are set during installation before the driver is connected. Once configured, the settings remain fixed unless physically adjusted.

    Can the Lumina be dimmed?

    Yes, but only with trailing-edge dimmers. Leading-edge dimmers are not compatible and may cause flicker or failure. Verify dimmer compatibility with Knightsbridge's compatibility list before installation.

    What is L70B50 and what does 35,000 hours mean?

    L70B50 is a lifetime rating meaning that after 35,000 hours of operation, 50% of modules in a batch will still produce at least 70% of their original lumen output. At 8 hours per day, 35,000 hours equates to approximately 12 years of use.

    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.