New · Radar Motion Sensor Drivers

Lights that know
when you're there.

Our radar motion-sensor LED drivers dim your light to 20% when nobody's around and ramp instantly to 100% when someone walks in.
"Stop wasting electricity on empty corridors."
Smooth Power Radar Motion Sensor LED Drivers — SP-1375 and SP-1475
See Variants → How it works
SP-1375 · Tubelight · ₹180 · SP-1475 · 2×2 Panel · ₹215
The hidden cost
₹2,400

That's what a single 40W corridor light
costs you every year — running 24×7.

Apartment common corridors. Office staircases. Basement parking. Lift lobbies. They're lit every second of every day — even at 3 AM when nobody's passing through.

With our radar drivers, that same light dims to 20% when empty. That's ₹1,920 saved per light, per year. Multiply by 20 lights in a typical building.

How it works.

Three states. Fully automatic. No app, no setup, no ongoing cost.
1
20%

Nobody around

Driver holds the light at 20% brightness — just enough to see safely, hardly any electricity used.

2
100%

Motion detected

Radar spots any person, pet or vehicle entering the zone. Light ramps smoothly to full brightness.

3
30s later

Area empties

After 30 seconds with no motion, light smoothly returns to 20%. No abrupt cut-off, no dark moments.

See it live

Watch the driver
in action.

Real footage from our workshop — empty room at 20%, motion detected, full 100% brightness, then smooth fade back.

One driver. Two fittings.

Pick the right form factor for your light — same electricals, same 40W smart dimming.
Tubelight · 4ft

SP-1375

For 40W LED tubelight retrofits
SP-1375 40W Radar Driver for Tubelights
122 × 21 × 16 mm · slim PCB
₹180 ₹230 22% OFF
View Product →
2×2 Panel · Downlight

SP-1475

For 40W LED 2×2 panel retrofits
SP-1475 40W Radar Driver for 2x2 Panels
69 × 38 × 21 mm · compact square
₹215 ₹275 22% OFF
View Product →
5.8 GHz
Microwave radar

Radar. Not PIR.
It actually works.

PIR sensors (those plastic bubble sensors) fail in extremes — too hot in summer, too cold in winter, confused by moving curtains, blinded by direct sunlight, blocked by wooden doors.

Our drivers use 5.8 GHz microwave radar. It detects motion through walls, glass partitions, false ceilings and closed doors — and it's unaffected by temperature, humidity, dust or airflow.

DETECTION ZONE · 8m

Radar vs PIR sensor.

Why we chose radar for every single Smooth Power motion-sensor driver.
Radar (our driver)
PIR (common sensor)
Detection through walls
Yes — thin walls, glass, wood
No — needs line of sight
Works in hot weather (40°C+)
Yes — unaffected
Frequent false triggers
Detects pets / slow motion
Yes — any movement
Often misses
Can be hidden inside fitting
Yes — invisible install
Must protrude outside
Lifespan
Solid-state · 10+ years
Pyroelectric element ages
90%
Standby power saved

Smart dimming.
Never off. Never wasteful.

We didn't choose full on/off. When you walk through a corridor at night and the lights suddenly blast on, your eyes hurt. And full-off means a split-second of darkness while the light wakes up.

Instead, our driver stays at 20% — a soft ambient glow that's always "on" — and smoothly transitions to 100% when needed. No eye strain, no dark moments, still ~80% less power vs. 24×7 running.

Customizable: Need 10%, 30% or a specific dim level for your project? We can tune the standby brightness to match your requirement on bulk orders.

100%
When you walk in
20%
When you leave

Built for Indian installations.

Every feature engineered for the way our corridors and common areas actually work.

No False Triggers

Radar filtering distinguishes humans from AC drafts, curtains blowing and fan airflow.

Fits Inside Fittings

Slim PCB geometry slips inside tubelight end-caps and panel driver compartments — no visible sensor.

PF > 0.95

High power factor with low THD keeps your electricity bill honest — no reactive power penalty.

2.5kV Surge Immunity

IEC 61000-4-5 compliant. Handles your building's lightning-season voltage spikes without blinking.

440V Tolerant · 4hrs

Survives sustained over-voltage events up to 440V AC — common during grid spikes in Indian suburbs.

Made in Ghaziabad

Designed & manufactured at our Site-IV plant. 17 years of LED driver expertise behind every unit.

The numbers that matter.

Based on a 40W LED light running 24×7 at ₹8/kWh — the typical society common-area rate.
₹2,400

Annual cost before

40W × 24hrs × 365 days × ₹8/kWh

₹480

Annual cost after

Same light, ~90% of time at 20% brightness (dim mode)

₹1,920

You save, per year

Driver pays for itself in ~5 weeks · Life-long savings

Society with 20 common-area lights = ₹38,400 saved every year. Compounding across 10+ years.

Technical specifications.

Identical electricals · two form factors.
Models
SP-1375
Tubelight variant — 122 × 21 × 16 mm slim PCB for 4ft tubelight retrofit
SP-1475
2×2 Panel variant — 69 × 38 × 21 mm compact square for panel driver compartment
Topology
HPF Non-Isolated CVCC (Constant Voltage Constant Current)
Input
230V AC · 50 Hz
Full operating range: 150 – 280V AC
Sustainable over-voltage: 440V AC for up to 4 hours
Output
54 – 80V DC
500 mA ±5% · Up to 40W
No-load voltage: 120V DC max
Efficiency
Power factor: > 0.95
THD: < 10%
Efficiency: > 85%
Motion sensor
5.8 GHz microwave radar (separate module on flying lead)
Module size: 26 × 17 mm
Detection range: up to 8 metres
Hold-time: ~30 seconds after last motion
Dim levels: 20% ↔ 100% (smooth ramp · customizable on bulk orders)
Protections
Short-circuit · Open-circuit · Overload · Over-voltage
Surge immunity: 2.5 kV per IEC 61000-4-5
Built-in MOV + fusible resistor for line spikes
Environment
Ingress: IP-20 (dry indoor installations)
Operating temperature: -10°C to +40°C
Warranty
1 year replacement · Smooth Power Private Limited
Compliance
Made in India · Ghaziabad, UP
GSTIN 09AAZCS0655B1Z2

Pick your form factor.

Free delivery pan-India · 1-year warranty · COD available

SP-1375

For 4ft tubelight retrofits
₹180 ₹230 22% OFF Add to Cart →

SP-1475

For 2×2 panel retrofits
₹215 ₹275 22% OFF Add to Cart →

In stock · Ships from Ghaziabad · 1-year warranty · Bulk B2B enquiries: b2b.html