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Seren LED Recessed Downlight Tri-Wattage CCT Adjustable 15/20/25W - White

£2499
The RRP is the manufacturer's recommended retail price of the item.
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Description

The Knightsbridge Seren is a 192mm recessed LED downlight with three switchable power outputs (15W, 20W, 25W) and three selectable colour temperatures (3000K warm white, 4000K neutral white, 5000K cool white). Both wattage and CCT are adjusted via switches on the rear of the fitting before installation, allowing a single stock item to serve multiple applications without ordering separate variants.

Designed for commercial offices, retail spaces, hospitality and educational installations where lighting needs vary by zone or may change over time, the Seren eliminates the need to specify exact wattage and colour temperature during procurement. A reception area can be set to 15W 3000K for a warmer tone, while a back-office or stockroom area can be set to 25W 5000K for maximum brightness and clarity. The 110-degree beam angle provides even coverage across desks, aisles and open-plan areas.

The fitting is built around a die-cast aluminium heat sink with a white powder-coated finish and an opal polycarbonate diffuser that softens the LED output and reduces glare. The 170mm cut-out requires a minimum 100mm void depth for the heat sink and terminal block to recess fully. Spring clips secure the downlight into plasterboard or suspended tile ceilings, and plug-and-play connectors simplify wiring on multi-unit installations. The IP40 rating (IP20 from above) allows installation in dry internal environments, and the fitting carries Class II double-insulated construction requiring no earth connection.

The Seren achieves up to 168 lumens per watt depending on the selected wattage and CCT combination, with a rated L70B50 lifespan of 50,000 hours. An optional emergency conversion kit (EMKIT2) is compatible for premises requiring maintained or non-maintained emergency lighting. The fitting carries a 5-year manufacturer warranty and is backed by Knightsbridge's commercial lighting service network.

Specification
Diameter 192 mm
Recessed Depth 69.5 mm
Minimum Void 100 mm
Cut-out Diameter 170 mm
Construction Aluminium
Construction 2 & polycarbonate
Finish White
Class II
IP Rating IP40 (IP20 from above)
Primary Voltage 230V 50Hz
Diffuser Opal
Lamp Technology SMD LED
Lamp Included Yes
Dimmable No
L70B50 50000
Energy Rating (Class) post 2021 SLR C
Beam Angle 110
CCT 3000/4000/5000 K
Light Colour CCT
Lumens 1675/1750/1770/2180/2325/2335/3085/3305/3290 lm
Lumens (Light Source only) 4060 lm
Wattage 15 / 20 / 25
Efficacy 168.56 lm/W
CRI >80
Warranty 5
Downloads

Product Specification Sheet

Product Manual

Frequently Asked

How do I change the wattage and colour temperature?

The wattage and CCT are adjusted via DIP switches on the rear of the fitting before installation. Once the downlight is installed and powered, the settings cannot be changed without removing the fitting from the ceiling. Consult the product manual (linked above) for the exact switch positions for each combination.

What ceiling void depth is required?

A minimum 100mm void depth is required to accommodate the heat sink and terminal block. The recessed depth of the fitting itself is 69.5mm, but the void needs the additional clearance for heat dissipation and safe electrical connection.

Is the Seren dimmable?

No. The integrated LED driver does not support dimming. If dimming is required, consider a different Knightsbridge model with a DALI or phase-cut dimmable driver.

Can it be used with an emergency conversion kit?

Yes. The Seren is compatible with Knightsbridge's EMKIT2 emergency conversion kit, which provides maintained or non-maintained emergency lighting for commercial premises. The emergency kit is sold separately.

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 Seren is a 192mm recessed LED downlight with three switchable power outputs (15W, 20W, 25W) and three selectable colour temperatures (3000K warm white, 4000K neutral white, 5000K cool white). Both wattage and CCT are adjusted via switches on the rear of the fitting before installation, allowing a single stock item to serve multiple applications without ordering separate variants.

    Designed for commercial offices, retail spaces, hospitality and educational installations where lighting needs vary by zone or may change over time, the Seren eliminates the need to specify exact wattage and colour temperature during procurement. A reception area can be set to 15W 3000K for a warmer tone, while a back-office or stockroom area can be set to 25W 5000K for maximum brightness and clarity. The 110-degree beam angle provides even coverage across desks, aisles and open-plan areas.

    The fitting is built around a die-cast aluminium heat sink with a white powder-coated finish and an opal polycarbonate diffuser that softens the LED output and reduces glare. The 170mm cut-out requires a minimum 100mm void depth for the heat sink and terminal block to recess fully. Spring clips secure the downlight into plasterboard or suspended tile ceilings, and plug-and-play connectors simplify wiring on multi-unit installations. The IP40 rating (IP20 from above) allows installation in dry internal environments, and the fitting carries Class II double-insulated construction requiring no earth connection.

    The Seren achieves up to 168 lumens per watt depending on the selected wattage and CCT combination, with a rated L70B50 lifespan of 50,000 hours. An optional emergency conversion kit (EMKIT2) is compatible for premises requiring maintained or non-maintained emergency lighting. The fitting carries a 5-year manufacturer warranty and is backed by Knightsbridge's commercial lighting service network.

    Specification
    Diameter 192 mm
    Recessed Depth 69.5 mm
    Minimum Void 100 mm
    Cut-out Diameter 170 mm
    Construction Aluminium
    Construction 2 & polycarbonate
    Finish White
    Class II
    IP Rating IP40 (IP20 from above)
    Primary Voltage 230V 50Hz
    Diffuser Opal
    Lamp Technology SMD LED
    Lamp Included Yes
    Dimmable No
    L70B50 50000
    Energy Rating (Class) post 2021 SLR C
    Beam Angle 110
    CCT 3000/4000/5000 K
    Light Colour CCT
    Lumens 1675/1750/1770/2180/2325/2335/3085/3305/3290 lm
    Lumens (Light Source only) 4060 lm
    Wattage 15 / 20 / 25
    Efficacy 168.56 lm/W
    CRI >80
    Warranty 5
    Downloads

    Product Specification Sheet

    Product Manual

    Frequently Asked

    How do I change the wattage and colour temperature?

    The wattage and CCT are adjusted via DIP switches on the rear of the fitting before installation. Once the downlight is installed and powered, the settings cannot be changed without removing the fitting from the ceiling. Consult the product manual (linked above) for the exact switch positions for each combination.

    What ceiling void depth is required?

    A minimum 100mm void depth is required to accommodate the heat sink and terminal block. The recessed depth of the fitting itself is 69.5mm, but the void needs the additional clearance for heat dissipation and safe electrical connection.

    Is the Seren dimmable?

    No. The integrated LED driver does not support dimming. If dimming is required, consider a different Knightsbridge model with a DALI or phase-cut dimmable driver.

    Can it be used with an emergency conversion kit?

    Yes. The Seren is compatible with Knightsbridge's EMKIT2 emergency conversion kit, which provides maintained or non-maintained emergency lighting for commercial premises. The emergency kit is sold separately.

    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.