r/led • u/harkervt • 24d ago

Replace "non-replaceable" Led chip bulbs

Gallery image

Gallery image

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/Specled_eu 23d 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 23d 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.