I have some fluorescent light fixtures in my office that I want to convert to LEDs because the fluorescents are too bright and I can't dim them. I do not want to modify the existing wiring, but I do want to install a dimmer switch. Is there an LED driver available that will work on 120v, and can be dimmed with a standard wall switch? I have found some drivers that are dimmable, but they use some kind of low voltage signal wire for the dimming...