[Bloody Sam Roberts]

Don't LEDs still flicker with the cycle too?

No. They run on DC only. Incoming AC voltage must be converted to low voltage DC before the LED illuminates. No flicker there.

[lepton]

Unless they have a good rectifier, with capacitive storage, it’ll be a pulsing DC. Maybe these have it. I don’t know. ...or maybe 120 pulses per second is too fast to bothr the eyes.