Convert Tail Lamp Bulbs to LED bulbs?

[Best4x4xFAR]

Hello All,

I've tried to search the subject, but maybe I am doing something wrong, because I'm not coming up with many results. Is there a tried and true LED bulb people are using to replace the tail brake light bulbs in the E53 Tail lights (upper and lower, as well as a clear when off, Amber when lit turn signal option, would I need a different relay for turn signals to prevent odd flash rates)?

Do I need a different bulb for the top rather than the bottom (they seem to both be 21 w single filament bulbs, and the control board on the tail lamp controls the intensity of the bulbs between taillight and brake light duty I guess)?

Is something like this a good choice? Or can these even be done given the fact that it seams as though the tail lamp board varies voltage for LED and Brake light functionality..

EDIT: I guess I would need these CAN BUS style bulbs to be able to effectively replace the tail\brake lamp bulbs?