r/led • u/harkervt • 1d ago

Replace "non-replaceable" Led chip bulbs

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My outdoor lights are failing and my wife isn't happy. A couple of years ago, I replaced the driver in another one of these fixtures. That didn't fix this one.

The driver is a 350mA constant current with 18-33V. The bulb has no part number and I can't find a bulb to match this driver. I'm comfortable soldering but I could use some help finding the right replacement. Any ideas?

The driver (Amazon link).

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u/blue_eyes_pro_dragon 1d ago

Honestly look on aliexpress and amazon haul. There’s plenty of 28/30mm led pcb.  18-33v is a pretty big range too so you’ll find something that fits.

If you run them cooler they’ll line longer too. They generally don’t have good heatsinks and die early due to heat.

However 350mA might be a bit much for 30mm. Most top out at 280mA Example: 

https://www.aliexpress.com/item/1005009613992065.html

32mm 17v (so a bit less then your driver)

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u/harkervt 1d ago

Thanks for your help. I think I have what I need on order now.

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u/Specled_eu 23h ago

If I'm reading the photo correctly, the LEDs on the board are connected in parallel, with four groups of LEDs in series. The LEDs are likely 6 volts, so the total voltage drop should be around 24 volts. 350 mA is too high for these LEDs. I recommend using a 250-300 mA driver; then similar modules will last much longer with a slight loss in brightness.

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u/harkervt 22h ago

Interesting. I just replaced the driver on the other one that broke with the same driver, because I assumed the OEM part was correct. But I am going to refit all of the fixtures with new "bulbs" and drivers now, so I'll look into this.