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

Product ID: 421305167

Details

Brand
SUPERNIGHT
Colour
Black
Item weight
0.01 Ounces
Material
Metal
Product dimensions
8.6L x 8.6W x

⚡Max 30A power handling

🔆0%-100% PWM dimming

🛡️Aluminum housing durability

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Description

💡 Dim it your way, own the vibe.

BUILT TO ENDURE - Robust aluminum casing ensures superior heat dissipation and corrosion resistance for long-term reliability.
LED LIFESAVER TECH - PWM digital dimming prevents rush current, extending your LED strip’s lifespan and performance.
PLUG PLAY INSTALLATION - Screw-in terminals and pre-drilled mounts make setup quick and hassle-free—no electrician needed.
POWERHOUSE COMPATIBILITY - Supports DC 12V-24V LED strips up to 30A, ideal for professional-grade lighting setups.
SEAMLESS BRIGHTNESS CONTROL - Effortlessly dial your perfect ambiance from pitch dark to full glow with a smooth rotatable knob.

The SUPERNIGHT LED Light Strip Dimmer is a high-performance PWM dimming controller compatible with 12V-24V LED strips up to 30A. Featuring a durable aluminum housing for heat and corrosion resistance, it offers smooth 0%-100% brightness adjustment via a rotatable knob. Designed for easy installation with screw-in terminals and pre-drilled holes, it also protects your LEDs from rush current, ensuring longevity and consistent lighting quality.

Specifications

ASIN	B07HN1BJWK
Best Sellers Rank	#97,889 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #206 in Dimmer Switches
Brand Name	SUPERNIGHT
Color	Black
Customer Reviews	4.3 4.3 out of 5 stars (605)
Item Dimensions L x W x H	8.6L x 8.6W x 3.5H centimeters
Item Weight	0.01 Ounces
Manufacturer	SUPERNIGHT
Material Type	Metal
Model	7539579860
Part Number	BKC1265-GM
Smart Home Compatibility	Not Smart Home Compatible
Unit Count	1.0 Count

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C$2410

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In stock

Sold byAmazon NicaraguaDelivered 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 Nicaragua.

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