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, Dimmer Knob Adjust Brightness, ON/Off Switch, Aluminum Housing, PWM Anti-Surge, Fits 12-24V Strips

Product ID: 87748577

Details

Brand
SUPERNIGHT
Connector Type
Clamp
Contact Type
Normally
Current Rating
30 A
Item dimensions L x W x H
3.54 x 2.56 x
Material
Metal

⚡Supports 12V-24V, max 30A current

🔆0%-100% PWM dimming precision

🛡️Aluminum housing for heat & corrosion resistance

€ 29.99

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

LED PROTECTION TECH - PWM digital dimming prevents surge currents, extending your LED strip’s lifespan.
EFFORTLESS INSTALLATION - Screw-in terminals and pre-drilled mounts make setup quick and hassle-free—get glowing in minutes.
ROBUST POWER COMPATIBILITY - Handles a wide 12-24V range and up to 30A, powering your LED strips without compromise.
SEAMLESS BRIGHTNESS CONTROL - Rotary knob lets you dial in perfect lighting from subtle ambiance to full brilliance.
DURABLE COOL UNDER PRESSURE - Premium aluminum casing ensures long-lasting performance with superior heat dissipation.

The SUPERNIGHT LED Light Strip Dimmer is a versatile PWM controller compatible with 12V-24V LED strips, supporting up to 30A current. Featuring a smooth rotary knob for precise 0%-100% dimming, it’s housed in durable aluminum for excellent heat dissipation and corrosion resistance. Designed for easy installation with screw terminals and mounting holes, it also protects your LEDs from surge currents, ensuring long-lasting, customizable lighting solutions.

Specifications

ASIN	B07HN1BJWK
Actuator Type	Rotary
Best Sellers Rank	#19,081 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #46 in Dimmer Switches
Brand Name	SUPERNIGHT
Circuit Type	1-way
Color	Black
Connectivity Protocol	Wi-Fi
Connector Type	Clamp
Contact Material	Aluminum
Contact Type	Normally Closed
Control Method	App
Controller Type	Mechanical knob
Current Rating	30 A
Customer Reviews	4.2 4.2 out of 5 stars (665)
International Protection Rating	IP44
Item Dimensions	3.54 x 2.56 x 1.57 inches
Item Weight	0.27 g
Manufacturer	SUPERNIGHT
Material Type	Metal
Model	7539579860
Mounting Type	Surface Mount
Number of Items	1
Number of Positions	1
Operating Voltage	12 volts
Operation Mode	ON-NONE-OFF
Part Number	BKC1265-GM
Switch Type	Kill Switch
Terminal	Through Hole
Unit Count	1 Count
Upper Temperature Rating	80 °C
Wattage	720 watts

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