As an amateur EE, I have analysed some of LEDs when I wanted to light up my kitchen counters. I wanted flicker-free LEDs with high CRI and temperature matching the rest of my apartment.

I ordered samples of a lot of LEDs and found that almost all of them are using their parts, especially capacitors, well above the specs.

Driving caps at well above their specs, at high temperature, basically ensures speedy failure. Not only that, but undersized smoothing capacitor causes visible 100Hz flicker.

What's even more interesting is at the price point putting better caps was almost inconsequential to the price of the product. I have ordered capacitors that should have been there in the first place and replaced the original ones with the new ones. Not only LEDs are flicker free now, I suspect they will be serving me for much longer.