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Dimmable LED Drivers
— TRIAC (Phase-Cut) & 1-10V

Two dimming technologies, one manufacturer. TRIAC / phase-cut dimmable drivers that work with the wall dimmer you already have — and 1-10V analog dimmable drivers for offices, panels and street lights. 15W to 90W, high power factor, smooth flicker-free dimming all the way down.

Smooth Power SP-1825 40W 1-10V Dimmable LED Driver
TRIAC + 1-10V
Both protocols
15-90W
Range available
PF > 0.9
High power factor
No flicker
Across dim range

Two ways to dim — pick what fits your wiring

"Dimmable LED driver" covers two very different technologies, and choosing the right one is mostly about the wiring you already have. If the fixture is controlled by a wall-mounted dimmer knob on ordinary mains wiring, you need a TRIAC dimmable driver (also called a phase-cut dimmable driver). If the building runs a control pair to each fixture — common in offices, BMS-managed buildings and street-lighting networks — you need a 1-10V dimmable driver.

TRIAC · Phase-Cut

Dims from an ordinary wall dimmer

The wall dimmer "cuts" a slice of every AC waveform; the driver reads the cut angle and sets brightness to match. Works over your existing 2-wire mains — no control cable, no rewiring.

  • Perfect retrofit — swap driver, keep the wall dimmer
  • Homes, hotels, restaurants, banquet halls
  • Leading-edge & trailing-edge dimmer compatible
  • Models: SP-8223 (15W), SP-1123 (24W / 36W)
1-10V · Analog

Dims from a control wire or BMS

A separate low-voltage pair carries a 1-10V signal to each driver — 10V is full brightness, 1V is minimum. Dozens of fixtures dim together, precisely, from one controller, timer or building-management system.

  • Offices & conference rooms — daylight harvesting
  • Street lights — dim to 50% after midnight
  • Group control of many fixtures from one point
  • Models: SP-1688 (15W), SP-1825 (40W), SP-4926 (60-90W)

Our dimmable driver range

Five production models — TRIAC phase-cut for retrofit and hospitality, 1-10V analog for commercial and street lighting. Custom wattages and protocols (including 0-10V and DALI) available for OEM.

SP-8223 15W TRIAC Phase-Cut Dimmable LED Driver
SP-8223 · TRIAC

15W TRIAC Dimmable Driver

Compact phase-cut dimmable driver for COB downlights and small panels. Dims smoothly from an ordinary wall dimmer — the go-to choice for home and hotel-room downlights.

Wattage15 W
Output36-50V DC · 300mA
Input120-300V AC
DimmingTRIAC (phase-cut)
Power factor> 0.90
Surge2 kV
SP-1123 24W 36W TRIAC Phase-Cut Dimmable LED Driver
SP-1123 · TRIAC

24W / 36W TRIAC Dimmable Driver

Higher-power phase-cut dimmable drivers for larger COBs and ceiling panels. Same wall-dimmer simplicity, in 24W and 36W versions for bigger fixtures and brighter rooms.

Wattage24 W / 36 W
Output18-50V DC · up to 750mA
Input120-300V AC
DimmingTRIAC (phase-cut)
Power factor> 0.90
Surge2 / 2.5 kV
SP-1688 15W 1-10V Analog Dimmable LED Driver
SP-1688 · 1-10V

15W 1-10V Dimmable Driver

Compact analog-dimmable driver for COBs and small panels in commercial spaces. Brightness follows a 1-10V control signal — wire many fixtures to one rotary controller or BMS channel.

Wattage15 W
Output36-45V DC · 150-300mA
Input120-320V AC
Dimming1-10V analog
Efficiency> 85%
Surge2.5 kV
SP-1825 40W 1-10V Analog Dimmable LED Driver for 2x2 Panels
SP-1825 · 1-10V

40W 1-10V Dimmable Driver

The office workhorse — 40W analog dimmable driver for 2×2 ceiling panels and commercial fixtures. Wide 36-110V output window covers most panel LED boards on the market.

Wattage40 W
Output36-110V DC · 300-1000mA
Input120-320V AC
Dimming1-10V analog
Efficiency> 85%
Surge4 kV
SP-4926 90W 1-10V Dimmable LED Driver for Street Lights
SP-4926 · 1-10V

60-90W 1-10V Dimmable Driver

High-power analog dimmable driver for street lights, floodlights and large panels. Lets municipalities and campuses dim road lighting after midnight — big energy savings, roads stay lit.

Wattage60-90 W
Output36-90V DC · up to 2200mA
Input120-320V AC
Dimming1-10V analog
Efficiency> 85%
Surge4 kV

Where dimmable drivers earn their keep

Hotels & restaurants

One room, many moods — bright for cleaning, warm and low for dinner service. TRIAC dimming from the wall panel the staff already knows how to use.

Homes & bedrooms

Downlights that dim from the same knob that ran the old halogens. Retrofit the driver, keep the switchboard — the simplest upgrade in lighting.

Conference & banquet halls

Presentations need 20% light, receptions need 100%. Scene control across dozens of fixtures via 1-10V groups.

Offices — daylight harvesting

Sensors dim window-side panels when sunlight is strong and raise them as it fades — constant desk brightness, lower bills.

Street & campus lighting

Dim to 50% after midnight when traffic drops. A 90W fixture running six late hours at half power saves real money across hundreds of poles.

Showrooms & retail

Accent displays at full brightness, circulation areas softer — hierarchy of light that guides customers through the space.

How phase-cut dimming works

A TRIAC wall dimmer doesn't reduce voltage the way an old rheostat did — it slices time out of each AC half-cycle. Turn the knob down and the dimmer delays its turn-on point in every half-wave, "cutting" the leading (or trailing) edge of the waveform. The driver measures how much of the waveform survives and regulates its LED current proportionally.

The hard part — and where cheap dimmable drivers fail — is holding the LED current perfectly steady between those chopped waveforms. Poor drivers shimmer at low brightness, buzz audibly, or refuse to dim below 40%. Smooth Power's TRIAC dimmable drivers are designed for the leading- and trailing-edge dimmers actually sold in India, dim smoothly toward the bottom of the range, and keep the light flicker-free at every level — the same discipline we apply in our flicker-free range.

1-10V dimming sidesteps the waveform entirely: mains stays clean, and a separate control pair tells each driver what to do. That's why it scales so well — one 1-10V line can command an entire floor of panels or a whole road of street lights.

Frequently asked questions

What is a TRIAC / phase-cut dimmable LED driver?

A driver designed to dim from an ordinary wall-mounted dimmer — the kind used for fans and old incandescent bulbs. The dimmer cuts part of each AC waveform; the driver reads the cut and sets LED brightness to match. No control wiring needed, which makes TRIAC the easiest retrofit for homes, hotels and restaurants.

TRIAC vs 1-10V — which should I choose?

Choose by wiring. Wall dimmer on plain mains wiring → TRIAC (phase-cut). Separate control pair to each fixture, or BMS / group control → 1-10V. Homes and hospitality almost always want TRIAC; offices, panels and street lighting almost always want 1-10V.

Will it work with my existing wall dimmer?

Our TRIAC drivers are built for the leading-edge and trailing-edge dimmers common in India. Dimmer behaviour varies by brand, so for bulk projects we recommend testing a sample driver with your exact dimmer model first — we ship samples for compatibility testing.

Does the light flicker when dimmed low?

Not with a properly designed driver. Cheap dimmable drivers start to shimmer or strobe below ~40% brightness. Ours regulate current smoothly across the full range, so the light stays steady even at the bottom of the dial.

Can street lights be dimmed at night?

Yes — that's the classic SP-4926 use case. A timer, photocell controller or CCMS panel drives the 1-10V line to dim road lighting to 40-60% after midnight. Energy savings are substantial across hundreds of poles, and the road stays lit.

Do you make custom dimmable drivers for OEMs?

Yes — we're a dimmable LED driver manufacturer based in Ghaziabad (Delhi NCR), and we build custom TRIAC, 1-10V, 0-10V and DALI drivers to your spec from 500-unit MOQ: your voltage, current, form factor and label. WhatsApp +91 82872 62090 or email sales@smoothpower.in.

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