4 Gang 2-Way Intelligent Dimmer 10-200W LED - Polished Brass Screwless

The Knightsbridge SF2194PB is a 4-gang 2-way intelligent dimmer rated at 10-200W per gang for incandescent loads or 5-150W per gang for dimmable LED loads. Each rotary dimmer knob allows switching between trailing-edge and leading-edge modes via a front-accessible control, making it compatible with most dimmable LED, halogen and incandescent lamps without needing to remove the faceplate or rewire.

Designed for multi-zone lighting control in lounges, dining rooms and master bedrooms, the 4-gang configuration allows independent dimming of four separate lighting circuits from a single wall plate. The 2-way switching capability means each gang can be controlled from this dimmer and a second switch location elsewhere in the room. Each dimmer knob operates on a push on/off and rotary dim action, with the dimming level stored in memory when switched off and recalled on the next power-on.

The polished brass screwless faceplate clips onto a separate metal sub-frame fixed to a 25mm minimum back box, leaving no visible fixings on the wall once installed. The matching brass dimmer caps on each rotary control integrate cleanly with the faceplate finish. The dimmer includes overload and overheat protection plus an inrush current limiter to handle the switch-on surge from multiple LED lamps simultaneously. Premium-grade steel construction gives the plate rigidity and a substantial feel compared to plastic alternatives.

Each gang must control lamps of the same brand, type and wattage within that circuit — do not mix different lamp brands or wattages on the same dimmer gang, as this can cause flickering or reduce dimmer lifespan. The dimmer ships preset to trailing-edge mode, which suits most modern dimmable LEDs, but can be switched to leading-edge mode if compatibility issues occur with specific lamp models.

Product Specification Sheet

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

Trailing-edge mode suits most modern dimmable LEDs and low-voltage transformers, while leading-edge mode suits older incandescent and halogen lamps. This dimmer ships preset to trailing-edge but allows you to switch modes via the front control knob without rewiring, making it compatible with a wider range of lamps than fixed-mode dimmers.

Can I use different bulb brands on the same gang?

No. Each gang must control lamps of the same brand, type and wattage. Mixing different lamp brands or wattages on the same dimmer gang can cause flickering, buzzing or reduced dimmer lifespan due to differing electrical characteristics between lamp models.

What's the maximum load per gang?

Each gang handles 10-200W for incandescent or halogen lamps, or 5-150W for dimmable LED lamps. If you're controlling multiple LED downlights on one gang, total their wattage to confirm it stays within the 150W LED limit.

Is the screwless plate removable for redecorating?

Yes. The polished brass cover plate clips onto a separate metal sub-frame fixed to the back box. The cover can be unclipped for painting around the dimmer and re-clipped without disconnecting wiring.