Switched out the driver's side rear tail light assembly on a 2004 Prius.
In their infinite wisdom Toyota used integrated LED's for the brake lights while leaving standard bulbs for the turn signal and tail light, so if the brake lights go out, you have to change the whole thing.
Switched out the passenger side 3-4 years ago, I guess it was time for the driver's side.
Got a used OEM from a salvage shop. 5 out of the 6 LEDs light up bright and one faint (matches the passenger side FWIW). It'll do.