Apologies for the wall of text in advance.
I bought three 40W Energizer dimmable LED lightbulbs for a dimmer switch at home. Once I screwed them in, I noticed that when I turned on the switch, there was a particular buzz that came from them and the dimming would not work properly. I did a bit of research and it turned out I needed a specific LED dimmer switch to go with the dimmable LED lights. I thought "oh, well, I'll just replace it with a normal switch". I left it like that for a few weeks since it wasn't a huge priority. The buzz eventually went away and I kinda forgot about it completely.
However, I noticed that over time one by one the lightbulbs would stop coming on every time I turned the switch on. I ignored it for the first one since I thought it was just the dimmer switch, but I had another light not come on today and it got me worried. I tested it in another light socket that's connected to a normal switch and it won't come on, so I worry it's been buggered (the third one that still works, worked in the other socket).
Are they salvageable at all? Have I just ruined two otherwise perfectly good LED lights?