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Seren Dimmable LED Recessed Downlight 15/20/25W Switchable CCT - White

£3599
The RRP is the manufacturer's recommended retail price of the item.
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Description

The Knightsbridge Seren is a recessed LED downlight with three switchable wattage settings (15W, 20W, 25W) and three selectable colour temperatures (3000K warm white, 4000K neutral white, 5000K cool white). A DIP switch on the rear of the driver allows the installer to select the required output and colour temperature before ceiling installation, making it possible to standardise on a single product across different zones within the same project.

Designed for commercial applications including offices, retail spaces, hotels and education facilities, the Seren fits a 170mm ceiling cut-out and requires a minimum 100mm ceiling void to accommodate the 69.5mm recessed depth and driver assembly. The fitting uses a die-cast aluminium heat sink with white powder-coated finish and an opal polycarbonate diffuser that produces a 110-degree beam angle, suitable for general area lighting rather than accent or task work. The Class II double-insulated construction means no earth connection is required during installation.

The 0-10V dimming protocol allows the Seren to integrate with most commercial lighting control systems, though compatibility should be confirmed with the specific dimmer model before installation. Plug-and-play connectors on the driver simplify first-fix wiring and allow the fitting to be removed for ceiling maintenance without needing to re-wire. The fitting carries an IP40 rating from below (IP20 from above), making it suitable for dry interior environments but not bathrooms or wet areas. Knightsbridge rates the LED module at 50,000 hours L70B50 lifespan and backs the fitting with a five-year warranty.

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 Yes*
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 (15W/20W/25W) and CCT (3000K/4000K/5000K) are selected using DIP switches on the driver before the fitting is installed in the ceiling. Once the ceiling is closed up, these settings cannot be changed without removing the fitting to access the driver.

What ceiling void depth is required?

A minimum 100mm ceiling void is required to accommodate the 69.5mm recessed depth of the fitting plus the driver assembly and wiring connections.

Is the Seren suitable for bathroom installation?

No. The IP40 rating (IP20 from above) makes the Seren suitable for dry interior commercial spaces only. It does not meet the IP rating requirements for bathroom zones.

What dimming protocol does it use?

The Seren uses 0-10V dimming protocol. Check compatibility with your specific dimmer or lighting control system before installation, as not all 0-10V dimmers behave identically at low dim levels.

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 recessed LED downlight with three switchable wattage settings (15W, 20W, 25W) and three selectable colour temperatures (3000K warm white, 4000K neutral white, 5000K cool white). A DIP switch on the rear of the driver allows the installer to select the required output and colour temperature before ceiling installation, making it possible to standardise on a single product across different zones within the same project.

    Designed for commercial applications including offices, retail spaces, hotels and education facilities, the Seren fits a 170mm ceiling cut-out and requires a minimum 100mm ceiling void to accommodate the 69.5mm recessed depth and driver assembly. The fitting uses a die-cast aluminium heat sink with white powder-coated finish and an opal polycarbonate diffuser that produces a 110-degree beam angle, suitable for general area lighting rather than accent or task work. The Class II double-insulated construction means no earth connection is required during installation.

    The 0-10V dimming protocol allows the Seren to integrate with most commercial lighting control systems, though compatibility should be confirmed with the specific dimmer model before installation. Plug-and-play connectors on the driver simplify first-fix wiring and allow the fitting to be removed for ceiling maintenance without needing to re-wire. The fitting carries an IP40 rating from below (IP20 from above), making it suitable for dry interior environments but not bathrooms or wet areas. Knightsbridge rates the LED module at 50,000 hours L70B50 lifespan and backs the fitting with a five-year warranty.

    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 Yes*
    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 (15W/20W/25W) and CCT (3000K/4000K/5000K) are selected using DIP switches on the driver before the fitting is installed in the ceiling. Once the ceiling is closed up, these settings cannot be changed without removing the fitting to access the driver.

    What ceiling void depth is required?

    A minimum 100mm ceiling void is required to accommodate the 69.5mm recessed depth of the fitting plus the driver assembly and wiring connections.

    Is the Seren suitable for bathroom installation?

    No. The IP40 rating (IP20 from above) makes the Seren suitable for dry interior commercial spaces only. It does not meet the IP rating requirements for bathroom zones.

    What dimming protocol does it use?

    The Seren uses 0-10V dimming protocol. Check compatibility with your specific dimmer or lighting control system before installation, as not all 0-10V dimmers behave identically at low dim levels.

    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.