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1 Gang 2-Way 10-200W (5-150W LED) Intelligent Dimmer - Matt White Screwless

£1899
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Description

The Knightsbridge SF2191MW is a 1-gang 2-way intelligent dimmer switch rated for 10-200W loads on incandescent and halogen lamps, or 5-150W on LED lamps. The dimmer uses a rotary knob with integrated push-on/push-off control, allowing smooth dimming from the front panel without needing a separate switch. A matt white screwless faceplate with matching dimmer cap sits 4.3mm proud of the wall once installed, giving a minimal profile for contemporary and modern interiors.

Pre-set to trailing-edge mode for LED compatibility, the dimmer can be switched to leading-edge mode via the front-mounted knob, making it compatible with most dimmable LED, CFL, incandescent and halogen lamps. The 2-way wiring allows control from two separate switch positions, commonly used in hallways, staircases and larger rooms with entry at both ends. The dimmer fits a 25mm minimum back box and connects via screw terminals with an earth terminal provided.

Built-in overload protection, overheat shutdown and an inrush current limiter prevent damage from transient loads or over-current conditions. The front knob also acts as the mode-switching and trim control, allowing fine adjustment of minimum and maximum brightness levels once installed. The matt white finish provides a clean, neutral accent that pairs with white walls, light-toned joinery and minimal interiors without creating visual contrast.

For best performance, use identical lamp types and wattages on the same dimming circuit. Mixing different LED brands, wattages or lamp technologies on one dimmer can cause flicker, buzzing or incomplete dimming range. Where mixed lamp types are unavoidable, test the combination before final installation.

Specification
Height 87.5 mm
Width 87.5 mm
Projection 4.3 mm
Recessed Depth 21.3 mm
Min. Mounting Box Depth 25mm
Construction Premium grade steel
Finish Matt White
Class I
IP Rating IP20
Primary Voltage 230V 50Hz
Earth Terminal Yes
Terminal Screw
Warranty 2
Downloads

Product Specification Sheet

Frequently Asked

What lamps does this dimmer work with?

The dimmer is pre-set to trailing-edge mode for LED lamps (5-150W) and can be switched to leading-edge mode for incandescent and halogen lamps (10-200W). It works with most dimmable LED, CFL, incandescent and halogen bulbs. Compatibility varies by lamp brand, so test before final installation if using unfamiliar lamp types.

What does 2-way mean?

2-way wiring allows the same light to be controlled from two separate switch positions, typically at opposite ends of a hallway or staircase. This dimmer replaces one of the two switches in a 2-way circuit and provides dimming from that position, while the other switch acts as a standard on/off control.

What back box depth is required?

A 25mm minimum back box depth is required. The recessed depth of the dimmer is 21.3mm, with an additional 4.3mm projection from the wall once the screwless cover plate is fitted.

Can I use different LED bulbs on the same circuit?

Mixing different LED brands, wattages or lamp types on one dimmer can cause flicker, buzzing or incomplete dimming. For best performance, use identical lamps on the same dimming circuit. If mixing is unavoidable, test the combination before completing installation.

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 SF2191MW is a 1-gang 2-way intelligent dimmer switch rated for 10-200W loads on incandescent and halogen lamps, or 5-150W on LED lamps. The dimmer uses a rotary knob with integrated push-on/push-off control, allowing smooth dimming from the front panel without needing a separate switch. A matt white screwless faceplate with matching dimmer cap sits 4.3mm proud of the wall once installed, giving a minimal profile for contemporary and modern interiors.

    Pre-set to trailing-edge mode for LED compatibility, the dimmer can be switched to leading-edge mode via the front-mounted knob, making it compatible with most dimmable LED, CFL, incandescent and halogen lamps. The 2-way wiring allows control from two separate switch positions, commonly used in hallways, staircases and larger rooms with entry at both ends. The dimmer fits a 25mm minimum back box and connects via screw terminals with an earth terminal provided.

    Built-in overload protection, overheat shutdown and an inrush current limiter prevent damage from transient loads or over-current conditions. The front knob also acts as the mode-switching and trim control, allowing fine adjustment of minimum and maximum brightness levels once installed. The matt white finish provides a clean, neutral accent that pairs with white walls, light-toned joinery and minimal interiors without creating visual contrast.

    For best performance, use identical lamp types and wattages on the same dimming circuit. Mixing different LED brands, wattages or lamp technologies on one dimmer can cause flicker, buzzing or incomplete dimming range. Where mixed lamp types are unavoidable, test the combination before final installation.

    Specification
    Height 87.5 mm
    Width 87.5 mm
    Projection 4.3 mm
    Recessed Depth 21.3 mm
    Min. Mounting Box Depth 25mm
    Construction Premium grade steel
    Finish Matt White
    Class I
    IP Rating IP20
    Primary Voltage 230V 50Hz
    Earth Terminal Yes
    Terminal Screw
    Warranty 2
    Downloads

    Product Specification Sheet

    Frequently Asked

    What lamps does this dimmer work with?

    The dimmer is pre-set to trailing-edge mode for LED lamps (5-150W) and can be switched to leading-edge mode for incandescent and halogen lamps (10-200W). It works with most dimmable LED, CFL, incandescent and halogen bulbs. Compatibility varies by lamp brand, so test before final installation if using unfamiliar lamp types.

    What does 2-way mean?

    2-way wiring allows the same light to be controlled from two separate switch positions, typically at opposite ends of a hallway or staircase. This dimmer replaces one of the two switches in a 2-way circuit and provides dimming from that position, while the other switch acts as a standard on/off control.

    What back box depth is required?

    A 25mm minimum back box depth is required. The recessed depth of the dimmer is 21.3mm, with an additional 4.3mm projection from the wall once the screwless cover plate is fitted.

    Can I use different LED bulbs on the same circuit?

    Mixing different LED brands, wattages or lamp types on one dimmer can cause flicker, buzzing or incomplete dimming. For best performance, use identical lamps on the same dimming circuit. If mixing is unavoidable, test the combination before completing installation.

    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.