Comment by krackers
12 days ago
It's mostly a crapshoot even within the same model line. Even under "Philips UltraDefinition" some styles have high flicker while others don't. I'm not sure being dimmable is any guarantee of smoothing quality, in fact dimming is usually implemented with PWM as I understand so the easy solution to avoid flicker of chucking a smoothing capacitor on there might make it harder to implement dimming. (To dim properly without noticeable I think you'd have to PWM in the kHz range. Even cheap CFLs necessarily had the technology to operate on this frequency, for some reason it seems rare for LEDs to do it.)
They are specifically advertised to be compatible with old dimmers. I'm not an EE but old dimmers are implemented with triac which necessitates some juicy capacitors to hold the charge. Of course they could reintroduce flicker later in the pipeline for some reason, but why would they?
Oh that's interesting, LEDs used to require special dimmers. Maybe they have changed things with the latest generation of bulbs.