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1 Gang 2-Way Intelligent Dimmer 5-400W (5-150W LED) - White Square Edge

£1499
The RRP is the manufacturer's recommended retail price of the item.
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Description

The Knightsbridge SN2191 is a 1-gang 2-way intelligent dimmer rated at 5-400W for incandescent loads or 5-150W for LED loads, controlled by a centre-mounted rotary knob on a white square edge faceplate. The dimmer automatically switches between trailing-edge and leading-edge modes to suit different dimmable lamp types, and all mode adjustments can be made from the front control knob without removing the faceplate.

Designed for residential and commercial installations where lighting levels need regular adjustment, the 2-way wiring allows the dimmer to be paired with a second switch on the same circuit for dual-location control. The push-on/push-off rotary operation provides smooth dimming with one hand, and the intelligent mode-switching handles most dimmable LED, halogen and incandescent lamps without needing manual calibration. The dimmer fits a standard 25mm minimum back box depth and carries an IP20 rating for dry indoor use.

The white square edge faceplate is moulded from 9mm thermoset resin with anti-microbial properties, giving a hard-wearing surface that resists scratches and discolouration. The square edge profile sits flush with the wall rather than raised, making it less prone to accidental knocks. Note that this dimmer must be used with dimmable lamps only, and all lamps on the same circuit must be the same brand and wattage to avoid flicker or inconsistent dimming behaviour.

Specification
Height 86mm
Width 86mm
Depth 43.8mm
Projection 26.5°
Recessed Depth 16.3mm
Min. Mounting Box Depth 25mm
Construction Thermoset resin
Finish White
IP Rating IP20
Primary Voltage 230V 50Hz
Downloads

Product Specification Sheet

Frequently Asked

What lamps can this dimmer control?

The dimmer handles dimmable incandescent, halogen and LED lamps. For incandescent and halogen the load range is 5-400W. For LED the range is 5-150W. The dimmer automatically switches between trailing-edge and leading-edge modes to suit different lamp types, but all lamps on the same circuit must be the same brand and wattage to avoid flicker.

What does 2-way mean?

2-way wiring allows this dimmer to be paired with a second switch on the same lighting circuit, so the same light can be controlled from two locations. This is common in hallways, staircases and larger rooms with two entry points.

How is the dimmer mode adjusted?

All mode adjustments, trimming and reset functions are accessed from the front rotary control knob. There is no need to remove the faceplate or access rear switches to change between trailing-edge and leading-edge modes or to recalibrate when lamps are changed.

What back box depth is needed?

A minimum 25mm back box depth is required. The dimmer has a total depth of 43.8mm, with 16.3mm recessed into the back box and 26.5mm projecting from the wall once installed.

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 SN2191 is a 1-gang 2-way intelligent dimmer rated at 5-400W for incandescent loads or 5-150W for LED loads, controlled by a centre-mounted rotary knob on a white square edge faceplate. The dimmer automatically switches between trailing-edge and leading-edge modes to suit different dimmable lamp types, and all mode adjustments can be made from the front control knob without removing the faceplate.

    Designed for residential and commercial installations where lighting levels need regular adjustment, the 2-way wiring allows the dimmer to be paired with a second switch on the same circuit for dual-location control. The push-on/push-off rotary operation provides smooth dimming with one hand, and the intelligent mode-switching handles most dimmable LED, halogen and incandescent lamps without needing manual calibration. The dimmer fits a standard 25mm minimum back box depth and carries an IP20 rating for dry indoor use.

    The white square edge faceplate is moulded from 9mm thermoset resin with anti-microbial properties, giving a hard-wearing surface that resists scratches and discolouration. The square edge profile sits flush with the wall rather than raised, making it less prone to accidental knocks. Note that this dimmer must be used with dimmable lamps only, and all lamps on the same circuit must be the same brand and wattage to avoid flicker or inconsistent dimming behaviour.

    Specification
    Height 86mm
    Width 86mm
    Depth 43.8mm
    Projection 26.5°
    Recessed Depth 16.3mm
    Min. Mounting Box Depth 25mm
    Construction Thermoset resin
    Finish White
    IP Rating IP20
    Primary Voltage 230V 50Hz
    Downloads

    Product Specification Sheet

    Frequently Asked

    What lamps can this dimmer control?

    The dimmer handles dimmable incandescent, halogen and LED lamps. For incandescent and halogen the load range is 5-400W. For LED the range is 5-150W. The dimmer automatically switches between trailing-edge and leading-edge modes to suit different lamp types, but all lamps on the same circuit must be the same brand and wattage to avoid flicker.

    What does 2-way mean?

    2-way wiring allows this dimmer to be paired with a second switch on the same lighting circuit, so the same light can be controlled from two locations. This is common in hallways, staircases and larger rooms with two entry points.

    How is the dimmer mode adjusted?

    All mode adjustments, trimming and reset functions are accessed from the front rotary control knob. There is no need to remove the faceplate or access rear switches to change between trailing-edge and leading-edge modes or to recalibrate when lamps are changed.

    What back box depth is needed?

    A minimum 25mm back box depth is required. The dimmer has a total depth of 43.8mm, with 16.3mm recessed into the back box and 26.5mm projecting from the wall once installed.

    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.