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

This dimmer switch operates a 60" run of Kichler 24V dimmable tape light and it performs perfectly. I get no humming or flicker at any brightness setting, but this tape light brand is quiet with another dimmer switch brand so it may be the LED pulse width modulation is very compatible with dimmers. Illumination range is roughly 5% to 100%, with a smooth transition. No flickering. The installation is absolutely straightforward and stripped wire locks into the connections with ease. I think it took me more time to mount the dimmer to the wall than to connect the wires.

Worked great in my RV for under counter led light strip.

Ok I'm not an electronics expert. I built a drag race practice tree off of dc truck blinkers. Long story short they were insanely bright to the point it felt like flash burn after using it for a while. Got this dimmer since it was like 10 bucks. Figured why not. I was a little disappointed when I got it because it controlls through the ground not the hot side. This is what it is, my tree was controlling the power side. So I kinda gave up on it. Then I had an epiphany and figured out how to isolate the common ground the lights use which is the entire frame and was able to get this to work which was exciting. After messing with it it really does act like it's just a rheostat. But I did use my voltmeter and it says its operating at 1.20k hz. So that I think means it is indeed pwm. But across the terminals the volt meter reads just like a rheostat with battery voltage at max setting and it just drops voltage down to about 3 volts before the LEDs just shut off due to low voltage. For me the sweet spot on brightness is right in that very bottom range. My understanding is that with pwm you should still be getting battery voltage across the terminals and that the frequency should be changing not the voltage. But regardless it does get the job done. I may try another brand and see how it acts.

This is a very good quality dimmer. There is some information which would help if it was spelled out a little better to the consumer. Most 12-volt lighting will work on both 12v DC systems (vehicles or strip lighting) and 12v AC systems (most landscape lighting). But this and most other 12v dimmers will only work on 12v DC systems--it will not work on the typical Home Depot or Menards outdoor landscape systems that operates off of a transformer that is plugged into an AC electrical system. If you purchase this dimmer and it does not work--it might not be defective but rather is just incompatible with your system.

I generally have the mindset that if I know something is a cheap piece of crap from overseas, I shouldn't buy it, but I really needed a simple PWM circuit to test out as a motor controller. I took a chance, hoping that this would work.I finally got it and was wiring it up to my motor and power supply and right as I was about to connect the last wire to the circuit before testing it, I touched the wire to the terminal and the motor went full speed. I jumped in my chair since the dimmer was off. I tried it again, hoping I had hallucinated, and it did the same thing. I disconnected everything and tested the resistance between the V+ IN and V+ OUT terminals. No matter what position the knob was in, the resistance was a cool 4 Ohms. The same thing happened between the V- IN and V- OUT. If you don't know a little basic electronics, that essentially means that the dimmer was doing absolutely nothing. It could have just been two wires and functioned the same.I am disappointed, but not surprised. If I were you, I would steer clear of this product, and the 20 other ones that are identical on Amazon but with varying prices and strange names. Indusky? Supernight? Enthve? Rgbzone? Zookoto? Cllena? Is there some "weird name generator" they use? Who's coming up with this crap?! Anyway, rant over. Don't buy it.