Very tacky eBay LED filament bulb

Visually this LED filament bulb looks nice, and to be fair it does light up... But with no smoothing at all?

I fully understand the reliability of minimalist circuitry, but I wonder what effect the potential inrush current will have on the LEDs over time.

When you have a simple capacitive dropper and power is applied, then the discharged capacitor will represent a near short circuit initially, And that results in a current spike limited only by the wiring resistance and the LEDs. It's a very short pulse of current, but if you turn the power on at the peak mains voltage it will be a high current spike. That's even worse with a traditional dimmer, as half intensity will be turning the light on at peak mains voltage twice per cycle. That's 100-120 times a second.

My guess is that this is the cheapest and smallest universal LED drive module they stock. Primarily intended to fit into very small lamp caps, but also slapped into all the others too.


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