Need help correcting LED tail lights

[StagLefty]

Bob, your knowledge on the subject is truly..........illuminating.

He's a very bright man !!

[SideShow Bob]

If you do try the resistors, they get very hot with extended use, such as at red signals waiting to turn or forgetting to cancel them after a lane change & driving for miles before noticing them and canceling the turn signal.
They need to be mounted to metal parts, but not on the inside of body panels, they could possibly blister the paint on the outside.