the pure blue LEDs basically all you can do is dim them, i just put a little tiny piece of black insulation tape over them, and that's ok, but it's super annoying when they combine them with capacitative touch sensors, where you can't really do that... well, you can, fun fact about capacitative sensors is you can put tape over them and they still sense touch

i live out in the boonies now and the air here is really good except when we get a dust storm blow out over the atlantic from mauritania and morocco, which can be hellishly bad, in fact, last time it happened i had serious breathing problems

but aside from that, i really just need to open my windows, the nearest heavy industry to me is on the opposite side of a mountain range that reaches over 5000 feet at the highest ...

but i still want a goddamn ionizer... this place i live in has raw resin composite wood panels everywhere, and i know it's filling the air with VOCs and an ioniser helps that stuff get clear, though carbon filtering is even better

the HEPA filters are annoying though, really, once they get ladened with too much crud they smell bad and are just shitty trash you have to throw out and the price of the replacements is pretty steep in a lot of cases

one thing i will say is that you should avoid the ones that have cylindrical filter units, those are so space-inefficient the price and the shipping cost of them... simple flat panels under an inch thick work way better and are cheaper and cheaper to transport