One point - there are old dimmer controls, and there are new dimmer controls. The old ones, as well as some of the cheap ones that are still being sold are intended only for incandescent (aka filament) based lighting. The companies that make them don’t always make it easy to find out if the dimmer is intended to work with LEDs - I found this out the hard way.
One example is some of the dimmer controls that are illuminated. I bought one for our dining room, which has a chandelier with decorative LED bulbs. The trickle current that it uses to light up the control is strong enough to illuminate the entire chandelier… Just a little bit. You can only see it at night.
