LED Driver 300mA (Constant Current Output) 60V-120V (Input 100-240V AC-DC) (20-36) x1W 20W 24W 30W 36W Power Supply 300 mA Lighting Transformer Drivers for High Power COB Chips (Plastic Case)

I used this to repair an older led pole light. I think they are still being sold here under the name Torchstar. It has a good cast aluminum case that kept water out fine, so I'd like to keep it around. The original driver stopped working, and there were a few individual chips burnt out. Took me a lot of probing and checking to determine the way the leds were in the circuit. No information on the original driver. For this light, it was 75 leds, three parallel branches of 25 leds each. So around 75v drop and 450ma driving the three branches seemed about right. After replacing about four chips last night I hooked it up to the driver and it came on fine and all chips were on. Today I wired everything back into the lamp, cleaned off the old heat transfer paste, put new paste on, and put the repaired panel back into the lamp. I put power back on it, and it came on great again. Then it shut off after a few seconds. Then it came back on for a couple seconds. Then back off. Strobing. Great. I didn't have it on much last night and kicked myself for not just plugging it in for 10 min today to check it before I put it together with the heat transfer paste that is incredibly messy. I thought the new driver was not handling all the leds; and cutting out and back on. Miffed, and wondering about a return or if it was worth checking the voltage on it, I was about ready to chuck the whole thing into scrap metal. I then had another thought. Couldn't be that simple. I held my hand over the light sensor and plugged it back in. The board came on. And stayed on for 5 min. I took my hand off the sensor, a couple seconds later the light shut off. Then a couple seconds after that it came back on again. So DIY'ers, remember that dusk to dawn sensor that you cleaned up and checked weeks ago and made sure it worked? Well as luck would have it, it still works when you wire it back into the circuit. The light was coming on, bouncing around the white walls of my office, and then tripping the light sensor. Then the room, still lit but not bright enough apparently, would be dark enough to turn it back on and start the cycle all over. The driver works fine; fits good in that lamp I mentioned. No idea what kind of longevity it will have. I will probably keep this as a spare. Happy now.

These work as advertised. While they do work great with other COB lights I recommend that you use the Chanzon lights as they are more reliable and longer lasting.

Very Disappointing! Advertised as "Constant Current" driving 1 to 6 1w COB LED's. So I purchased this for a project with 6 X 1w COB LED's (from the same manufacturer) requiring 300mA each. This driver does a great job driving ONE bulb but as each subsequent bulb is turned on it goes downhill. Just a quick test- 1 Bulb 3.26v 2 Bulbs 3.05v 3 Bulbs 2.92v 4 Bulbs 2.83v 5 Bulbs 2.79v Did not test with 6 as the 6th port was occupied by my Fluke meter. So certainly not providing constant anything from 1 to 6 bulbs and with 6 bulbs all turned on the light output is very minimal and undetectable at 24".

Works but has a 1vse one delay when turning on switch

Out of the several I bought, one didn’t work initially, but now everything is working fine. Make sure to read the manual carefully

If you don't know what you are doing and you just slap one of these bad boys in place of a broken power supply without knowing what voltage peramiters or current draw you need, it may make your led blink, kill your led, just plain not working, or work for a couple seconds then poop out. If you notice a lot of the one star reviews have a lot of these problems or they are someone actually measuring the output and being mad it's plus or minus 5 or 10 percent(which is common industry standards). It's a very well priced constant current power supply just do the research, take your measurements and make sure you are buying the appropriate size. I have bought six of these transformers and each is working perfectly fine.

Perfect for their LED Chips sets. This driver is doing great for my little project and I don't see any flicker from the LED chips. Very much smaller than I initially expected so I was happy with that as well. Fit my very small project chassis excellently. I'm actually driving five LED Chips wired through a magnetic coupler and there is no voltage or wattage change, constant voltage even through multiple conductors. NOTE: I recently purchased a different driver for another project and it didn't work to specs. Still waiting to see how the seller handles this issue.

So far so good! I had a small light fixture that had blown the original driver. This was the closest I could find in terms of the constant mA output and I can't tell if the light is dimmer than before. I even put it up next to it's twin and I can't tell. Old one was 550mA and this one is 450mA.

Needed one of these to replace a failed unit in a fairly expensive light fitting and it did the job perfectly to the great pleasure of my son's family. Good product, very good price and great delivery. Thanks.

It works well

My 2nd purchase to replace a LED driver rated 30-43VDC 600ma. My 1st purchase is still working since installed in 2019. It will be nice if the output wires are connected by cable connectors instead of being soldered. This will facilitate replacing the output wires with DC connectors used by the original light fixture.

Replaced in our light….Saved a lot of money instead of replacing light!

Perfect replacement for a Robus wall light over 20 years old and no longer available. Back working perfect again.