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Rotary Dimmers

Dimmer collection.

Turn-to-set rotary control in cone and knurled profiles. Handcrafted in Belgium in a combination of finishes.

Lithoss Dimmer collection — rotary dimmers, handcrafted in Belgium
Turn to set. Hold until changed.

Two profiles. One principle.

The cone gives a clean taper from knob to wall. Minimal in section, resolved in form. The knurled gives grip and texture. A deliberate surface for a deliberate action. Both set level by rotation and hold it until changed. Both are handcrafted in Belgium.

Available frames

Three frames. One collection.

Original, Opera, and Circum share the same finish library and knob profiles.
The frame is the only variable.

Original Dimmer frame
US double-gang box
Original Dimmer

The square format. Cone and knurled knob profiles. Mounts on a US double-gang electrical box with a Lithoss mudring adapter.

Lithoss mudring required
Opera Dimmer frame
US single-gang box
Opera Dimmer

The rectangular format. Cone and knurled knob profiles. Mounts on a US single-gang electrical box. Direct mount. No adapter required.

Circum Dimmer frame
European standard box
Circum Dimmer

The round format. Cone and knurled knob profiles. Requires a European-standard electrical box. FD can source compatible boxes for US projects.

Confirm with AHJ before specifying
Profiles

Cone and knurled.

Cone profile

A clean geometric taper from knob to wall plate. Minimal in section — suited to spaces where Select is already the reference for restraint. Available in all 18 standard finishes.

Cone dimmer — Gunpowder finish
Cone dimmer profile
Cone dimmer — Tin Antique finish
Cone dimmer — in context
Knurled profile

A machined grip surface around the knob — tactile, precise, deliberate. Pairs naturally with Cockpit for spaces where material depth is part of the design language. Available in all 18 standard finishes.

Knurled dimmer — grip detail
Knurled dimmer profile
Knurled dimmer — Bronze Antique finish
Knurled dimmer — Peach finish
Dimmer Finish Variants — FD Mockup
Finish combinations

Dimmer finishes. By frame.

Each dimmer finish is a combination of plate finish and knob finish. Original and Circum share the same 23-combination palette. Opera has its own distinct set — 10 cone options and 4 knurl options, including four finishes exclusive to the Opera format. All finishes are made to order in Belgium — plate, frame, and knob finished together as a single unit.

Frame
Knob profile
★ No Black Knurl in Opera Dimmer
Cone — matching plate and cone in the same finish
Cone — contrasting plate and cone in different finishes
Knurl — Nickel Knurl
Knurl — Brass Knurl
Knurl — Black Knurl
Cone — matching plate and cone in the same finish
Cone — contrasting plate and cone in different finishes
Knurl — Nickel Knurl
Knurl — Brass Knurl
Matching vs contrasting: "Matching" means plate and cone are the same material. "Contrasting" pairs a plate finish with a different-toned cone — typically Textured Black. Both are specified as a single finish code. ★ Finishes marked with a star are available in Opera format only.
Knurl — Brass Knurl
Bronze Antique + Brass Knurl
Bronze Antique plate with a Brass Knurl grip surface. A warm, tonal combination — two antique metal tones in the same temperature range.
Original · Circum
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Technology

Three variants. Two architectures.

The KNX and Casambi variants are rotary controllers that send commands to separate actuators. The Mains Dimmer connects directly to the load. Confirm the right variant for your project before specifying.

Dm0K · Rotary controller
KNX dimmer.

Bus-powered rotary controller. Sends KNX group address commands to panel-mounted actuators. Not in the mains load path. Compatible with any KNX-native system. Crestron, Control4, Lutron HomeWorks, Savant, and RTI require a KNX gateway to bridge to the bus. ETS-programmable.

29V SELV · NEC Class 2 · No load wiring at switch
DmTVD · Rotary controller
Casambi dimmer.

Battery-powered wireless rotary controller. Sends Bluetooth mesh commands. Not in the mains load path. Controls RGB, Tunable White, and Mono Color White fixtures. No bus wiring between dimmers. Review NEC 210.70 for code-required lighting locations before specifying battery variant.

Bluetooth mesh · RGB, Tunable White, Mono White · Battery powered · NEC 210.70 review required

*Dimmer Universal (Dm0P) — phase-cut load dimmer, 120V compatibility under review. Contact us before specifying on US 120V circuits.

Available to trade professionals.

One application. One set of terms. Trade pricing from day one.