The one that got on my nerves recently is a little bedside 3-in-1 wireless charger.

Has one of the brightest LEDs I've seen lately right on front of the charger whenever a device is on it. Why would they put a bright light on a night-stand accessory, and put it in the front where its shining right into your eyes as you try to sleep?

Or better yet, why have an LED on it at all in the first place? Any device I'm putting on it has its own charging indicator, I don't need the charger itself to have one.

I much prefer two or three coats of black nail polish. It looks much nicer than tape, is more durable, and the light can barely be seen - just enough to see it when you want to. Like it should have been from the factory.

I use stickers designed for dimming LEDs. They’re almost like a thick window tint cut into various shapes. Dim enough to stop the LED from being annoying but you can still see its status.

A little more expensive, but they look a little nicer too.

Most of my devices have had ways to turn them off.

Router has a button which disable all lights until it's pressed again, monitors have the setting in their menus.

The only device thats shining brightly in my home is a storage controller I've got in my home server, with no way of turning it off - or at least dimming it down

yeah my routers' LEDs are obnoxiously bright, luckily they have an option in the app to turn it off on a schedule. The super bright green LED in my smoke detector unfortunately does not have this option. Nor do the blue LEDs in my smart outlets...

IME consumer electronics have gotten a lot better about this, but appliances and other things outside the tech sphere are still awful. My portable AC unit has a bright-as-hell seven-segment display for the temperature which shows "--" even when it's turned off!

Can't vouch for every model, but on all the ThinkPads I've owned every single LED can be disabled, including on the X13 I got last year.[1] This is actually one reason I buy ThinkPads. Other models I've had were T61, X270, E585, X280. I've heard the Carbon models are quite different from the T/X ones, so maybe you can't disable on those? That would be disappointing.

If you're on Linux the dot on the cover is /sys/class/leds/tpacpi::lid_logo_dot. See the other files in that directory for other LEDs.

I don't know about Windows off-hand because I don't use it, but the BIOS exposes the functionality so there should be a program to do it. In a quick search: https://github.com/valinet/ThinkPadLEDControl

FreeBSD doesn't support it, but quite easy to write a patch for it if you want it (I actually wrote a patch for this, but didn't really put the finishing touches on it and submit it as my previous one got no feedback at all, so *shrug* – I ended up just installing Linux again). Same for the other BSDs.

[1]: You need to compile your own kernel for the charging/power LED which wasn't needed on older models, because that's registered as "unknown LED" and protected behind a compile option. It's a tad annoying, but it's possible.