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

£1899
The RRP is the manufacturer's recommended retail price of the item.
120 In Stock - Ready to Ship
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Description

The Knightsbridge SF2191PC is a 1-gang 2-way intelligent dimmer supporting 10-200W incandescent or halogen loads, or 5-150W dimmable LED loads, behind a polished chrome screwless faceplate. The dimmer operates in both trailing-edge and leading-edge modes, with trailing-edge pre-set from the factory. A rotary push-on/off control in the centre of the plate allows brightness adjustment by rotation and power switching by pressing the knob.

Designed for living rooms, bedrooms and dining rooms where lighting levels need adjustment throughout the day, the dimmer suits single-circuit installations with consistent lamp types. Two-way wiring allows the dimmer to be paired with a standard two-way switch elsewhere in the room, so the same light can be controlled from two locations. The 25mm minimum back box depth requirement fits standard UK wall boxes, and the screwless cover plate clips onto a separate metal sub-frame for a clean wall finish with no visible fixings.

The dimmer includes anti-flicker circuitry, a trimmable range to fine-tune minimum brightness, overload protection, over-temperature protection and an inrush current limiter to handle the start-up surge of dimmable LED drivers. The polished chrome finish provides high reflectivity and pairs with contemporary, art deco and polished metallic interior schemes. The matching polished chrome dimmer cap integrates visually with the faceplate rather than standing proud as a separate colour.

Knightsbridge recommends using consistent lamp brands and wattages on the same dimmer circuit to avoid compatibility conflicts between different LED driver designs. Mixing lamp types or brands on a single dimmer may cause flicker, hum or reduced dimming range even when individual lamps are rated as dimmable.

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 Polished Chrome
Class I
IP Rating IP20
Primary Voltage 230V 50Hz
Earth Terminal Yes
Terminal Screw
Warranty 2
Downloads

Product Specification Sheet

Frequently Asked

What's the difference between trailing-edge and leading-edge dimming?

Trailing-edge dimming cuts the end of the AC waveform and suits dimmable LED and low-voltage halogen transformers. Leading-edge cuts the start of the waveform and suits resistive loads like incandescent bulbs. This dimmer ships pre-set to trailing-edge mode but can be switched to leading-edge if needed — see the datasheet for the mode-change procedure.

Can I use different LED bulb brands on the same dimmer?

Knightsbridge advises against mixing lamp brands or wattages on a single dimmer circuit. Different LED drivers respond differently to the same dimming signal, which can cause flicker, hum or inconsistent dimming range even when each individual lamp is rated as dimmable.

What back box depth is required?

A 25mm minimum back box depth is needed for safe installation. The screwless cover plate adds 4.3mm of projection from the wall once fitted, with the dimmer mechanism recessed 21.3mm behind the plate.

What does 2-way wiring mean?

Two-way wiring allows the same light to be controlled from two locations — for example, a dimmer by the door and a standard two-way switch by the bed. The dimmer must be wired as one of the two control points using standard UK two-way switch wiring.

Shipping & Returns

Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

To arrange a return, call us on 020 8149 5199 or use our contact page.

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Every product arrives brand new with the full manufacturer warranty. Found it cheaper elsewhere? Ask us about a price match.

Installation

Fits standard UK back boxes

Designed to fit standard UK back boxes for a straightforward swap of your existing fittings.

Ordering with us

Free delivery over £99

Free delivery on orders over £99, in the UK and worldwide. Easy returns within 14 days, subject to our returns policy. Full manufacturer warranty included.

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    Description

    The Knightsbridge SF2191PC is a 1-gang 2-way intelligent dimmer supporting 10-200W incandescent or halogen loads, or 5-150W dimmable LED loads, behind a polished chrome screwless faceplate. The dimmer operates in both trailing-edge and leading-edge modes, with trailing-edge pre-set from the factory. A rotary push-on/off control in the centre of the plate allows brightness adjustment by rotation and power switching by pressing the knob.

    Designed for living rooms, bedrooms and dining rooms where lighting levels need adjustment throughout the day, the dimmer suits single-circuit installations with consistent lamp types. Two-way wiring allows the dimmer to be paired with a standard two-way switch elsewhere in the room, so the same light can be controlled from two locations. The 25mm minimum back box depth requirement fits standard UK wall boxes, and the screwless cover plate clips onto a separate metal sub-frame for a clean wall finish with no visible fixings.

    The dimmer includes anti-flicker circuitry, a trimmable range to fine-tune minimum brightness, overload protection, over-temperature protection and an inrush current limiter to handle the start-up surge of dimmable LED drivers. The polished chrome finish provides high reflectivity and pairs with contemporary, art deco and polished metallic interior schemes. The matching polished chrome dimmer cap integrates visually with the faceplate rather than standing proud as a separate colour.

    Knightsbridge recommends using consistent lamp brands and wattages on the same dimmer circuit to avoid compatibility conflicts between different LED driver designs. Mixing lamp types or brands on a single dimmer may cause flicker, hum or reduced dimming range even when individual lamps are rated as dimmable.

    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 Polished Chrome
    Class I
    IP Rating IP20
    Primary Voltage 230V 50Hz
    Earth Terminal Yes
    Terminal Screw
    Warranty 2
    Downloads

    Product Specification Sheet

    Frequently Asked

    What's the difference between trailing-edge and leading-edge dimming?

    Trailing-edge dimming cuts the end of the AC waveform and suits dimmable LED and low-voltage halogen transformers. Leading-edge cuts the start of the waveform and suits resistive loads like incandescent bulbs. This dimmer ships pre-set to trailing-edge mode but can be switched to leading-edge if needed — see the datasheet for the mode-change procedure.

    Can I use different LED bulb brands on the same dimmer?

    Knightsbridge advises against mixing lamp brands or wattages on a single dimmer circuit. Different LED drivers respond differently to the same dimming signal, which can cause flicker, hum or inconsistent dimming range even when each individual lamp is rated as dimmable.

    What back box depth is required?

    A 25mm minimum back box depth is needed for safe installation. The screwless cover plate adds 4.3mm of projection from the wall once fitted, with the dimmer mechanism recessed 21.3mm behind the plate.

    What does 2-way wiring mean?

    Two-way wiring allows the same light to be controlled from two locations — for example, a dimmer by the door and a standard two-way switch by the bed. The dimmer must be wired as one of the two control points using standard UK two-way switch wiring.

    Shipping & Returns

    Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

    Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

    To arrange a return, call us on 020 8149 5199 or use our contact page.