[brucepick]

I've converted nearly all my exterior lights to LED, but not the blinkers.

First, I recognize that putting a resistor in the circuit (has to be in parallel, not in series) raises the amps draw to nearly what it was with tungsten bulbs. So, not much amps reduction.

And for what?? Unless your blinkers are switched on most of the time, their total current draw is not that much. Of course if your battery is a "starter" type and not a deep cycle, especially if it's on the small side - that would make it more important to reduce amps used by whatever means you can.

My battery that runs my blinkers has about 32AH actually available, and it's not connected to the alternator. No issues from powering blinkers.