I have to agree there are some dimmers which work better than others. Even for life expectancy of the bulb off the dimer. Years back I bought a dimmer and the bulb on it blew every two months. Different brand dimmer and the bulb lasted years. The bulbs in my bedroom on a dimmer have lasted eleven years now. Since I moved in..(and I turn them on and off every day multiple times a day 3 incandescent 100w) I have not changed them to LED since they may outlast me.
I have no DC problems either... that I know of.
(even though I rent, I do have a dedicated 20 amp circuit for the stereo)
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