this post was submitted on 30 Nov 2024
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It is either a ~~30~~ 60 or ~~60~~ 120 Hz flicker, depending on how they built the electronics. It is ~~30~~ 60 Hz if they didn't include an inverter and ~~60~~ 120 Hz if they did.
Without an inverter, it will be off for 50% of the time. With an inverter, it will always be on, but sometimes dim.
With better electronics, it will be steady on, but that's not common in christmas lights.
Not strictly always true, if the lights have any kind of dimming capability (like many of the ones with automated patterns) you'll likely be dealing with PWM which means the time spent lit can vary significantly
Wouldn’t that be 60 Hz without a rectifier, and 120 Hz with one? If the voltage crosses zero twice per cycle, but goes negative only once.
Yep, you're right. Had the 2 on the wrong side. Fixing.