this post was submitted on 30 Nov 2024
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141
Technology Connections: LED Christmas lights which don't hurt the eyes: it finally happened! (www.youtube.com)
submitted 3 weeks ago by Ghostalmedia@lemmy.world to c/videos@lemmy.world
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[–] ptz@dubvee.org 32 points 3 weeks ago (3 children)

This isn't what Christmas looks like. It's what a vape shop looks like. Or, worse, a gaming PC.

😆

My only gripe with the LED ones is that they always seem to have a high-frequency flicker which gives me a headache. Other people have told me they don't notice it, but I do. I wanted to replace the clear incandescent ones with LED but couldn't deal with the flicker.

[–] Brokkr@lemmy.world 13 points 3 weeks ago* (last edited 3 weeks ago) (2 children)

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.

[–] 9point6@lemmy.world 8 points 3 weeks ago

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

[–] Robomekk@lemmy.ca 4 points 3 weeks ago (1 children)

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.

[–] Brokkr@lemmy.world 4 points 3 weeks ago

Yep, you're right. Had the 2 on the wrong side. Fixing.

[–] Max_P@lemmy.max-p.me 8 points 3 weeks ago

But capacitors are so expensive, it's like a whole 10¢ extra to filter it out so it doesn't flicker!

[–] Vaggumon@lemm.ee 5 points 3 weeks ago (2 children)

I have 1,000% light perception, I notice the flicker on almost every LED I've ever seen.

[–] lastunusedusername2@sh.itjust.works 3 points 3 weeks ago

I worked with a guy who had the opposite. He couldn't tell how flickery his screen was.

[–] Rai@lemmy.dbzer0.com 2 points 3 weeks ago

My parents’ new house has all 60hz LED lights and I can’t stand being in there