Could someone tell me the frequency that this dimmer's pwm module operates at? my eyes are susceptible to led flicker. 60hz would be way too slow.

I just measured mine with an oscilloscope. It switches at 1200 Hz, which is lower frequency than I would’ve expected for a PWM switch. The minimum on period is about 5%, and the maximum is about 92%. Mine has a voltage drop (PWM +Mosfet RDSon) of approximately 1 V with a 14 amp load. it is probably in excess of 1.5 V at it’s rated load (30A). I use a Meanwell 15 volt 200 watt power supply set to 13.2 volts to get full brightness from my 12 V / 14 amp LED string. If you go this route, the voltage adjustment is a small potentiometer next to the terminal block on the power supply.

Will this work on a 18 w 12 v led light?

Yes and these dimmers work very well. I have 2 of them and they control 50 ft. of lights each. They are very "smooth" in dimming. Not all jumpy like others..

I wire from the battery to the "in" side and to the lights (strip led) on the "outside" of the controller. Works once then it won't dim?

I would send it back. Must be defective. Mine work fine

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SUPERNIGHT LED Light Strip Dimmer, DC12V-24V 30A PWM Dimming Controller for Dimmer Knob Adjust Brightness ON/Off Switch with Aluminum Housing

SUPERNIGHT LED Light Strip Dimmer, DC12V-24V 30A PWM Dimming Controller for Dimmer Knob Adjust Brightness ON/Off Switch with Aluminum Housing

Product ID: 457286808

Details

Brand
SUPERNIGHT
Connector type
Thread
Contact type
Normally Open
Current rating
30 Amps
Item dimensions L x W x H
9 x 6.5 x 4
Material
Aluminium

⚡Supports up to 30A current

🔆0%-100% PWM dimming

🛡️Durable aluminum housing

€ 28.02

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Description

💡 Light up your space, your way — brightness mastery at your fingertips!

BUILT TO LAST - Robust aluminum casing ensures superior heat dissipation and corrosion resistance for long-term reliability.
LED PROTECTION TECH - PWM digital dimming prevents rush current, extending your LED strip’s lifespan.
EFFORTLESS INSTALLATION - Screw-in terminals and pre-drilled mounts make setup quick and hassle-free—no electrician needed.
POWERHOUSE COMPATIBILITY - Handles DC 12V-24V LED strips up to 30A, ideal for professional-grade setups.
SEAMLESS BRIGHTNESS CONTROL - Rotary knob lets you dial in perfect lighting from 0% to 100% with smooth PWM dimming.

The SUPERNIGHT LED Light Strip Dimmer is a high-performance, manual rotary dimmer designed for DC 12V-24V LED strips, supporting up to 30A current. Featuring PWM technology for smooth 0%-100% brightness adjustment, it comes housed in durable aluminum for excellent heat dissipation and corrosion resistance. Easy to install with screw terminals and mounting holes, it also protects your LED strips from rush current, ensuring longevity and reliable performance.

Specifications

ASIN	B07HN1BJWK
Actuator Type	Rotary
Best Sellers Rank	15,468 in Lighting ( See Top 100 in Lighting ) 735 in LED Strips
Brand	SUPERNIGHT
Circuit Type	1-way
Colour	Black
Compatible Devices	LED light strips
Connectivity Protocol	Wi-Fi
Connector Type	Thread Terminals
Contact Material	Aluminium
Contact Type	Normally Open
Control Method	Push Button
Control Type	Manual
Controller Type	Mechanical knob
Country Of Origin	China
Current Rating	30 Amps
Customer Reviews	4.3 4.3 out of 5 stars (627)
International Protection Rating	IP44
Item Dimensions	9 x 6.5 x 4 centimetres
Item Weight	0.01 Ounces
Manufacturer	SUPERNIGHT
Manufacturer Part Number	BKC1265-GM
Material	Aluminium
Model Number	7539579860
Mounting Type	Surface Mount
Number of Items	1
Number of Positions	1
Operating Voltage	24 Volts
Operation Mode	ON-OFF
Specification Met	Ip44
Switch Type	Dimmer Button
Terminal	Screw
Unit Count	1.0 count
Upper Temperature Rating	80 Degrees Celsius
Wattage	720 watts

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€ 28.02

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Greece.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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