@octothorpe yes, but what I’m doing is funnier
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@thomasfuchs We have a standing ventilator with a "quiet" mode on the selector dial that is specifically marketed for sleep time, the indicator for that mode is… a bright blue light 
@thomasfuchs I bought some of these “LightDims” years ago & they’re great for this on most devices, although your button might be too 3D for them… 🤔
the website & marketing are terrible, but the product’s been good 🙃
@thomasfuchs I have that same purifier, and I do the same thing! (I use a glasses case). Things that go in bedrooms should not have always on lights!
@thomasfuchs I lied. Just the one button. Hold down the ionizer button for 3 secs.
@octothorpe yes, but what I’m doing is funnier
@thomasfuchs oh! I have that model. You can turn off the lights.
Instructions are actually on the top… you hold down two of the buttons and they’ll turn off.