Taillights work much better with LEDs for me. Much brighter!
I bought the LEDs on Amazon. I just picked some high rated ones. They weren’t that expensive.
I left the front turn signal’s incandescent so my flasher still worked. Get a flasher designed for LED lights if you are having issues. LED flashers often require a ground to work, so don’t forget that. Load resistors are a very crude way to solve the flasher issue.
Don‘t forget to change the emergency flasher too.