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Yes it absolutely is. Those are candle-style bulbs that use filament LEDs, they’re normally just use a basic rectifier and a regulator chip that does basic linear regulation of the peak of the sine wave.

They flicker at 100Hz due to the rectification (or 120hz in those 60hz countries of course).

Dimmable bulbs use higher frequencies.

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There is a pendant light in my entryway that came outfitted with LED filament bulbs when I bought my home. They flicker noticeably, and I would have replaced them all if it were in my living room.

One of the bulbs recently burned out, and I picked up a replacement at Menards. Even though it was just a basic Sylvania, the new one clearly has a rectifier circuit as it does not exhibit any flickering that I can detect.

So anecdotally at least, the cheap bulbs without rectifiers seem to be going away from the big box stores (although I’m sure you can still get them with unpronounceable all-caps names from Amazon).

I’ve only recently seen mains flicker from speciality bulbs, small filament style ones and odd fittings with low production rates.

The quick test is to wave your hand quickly in front of the light.

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