LED Taillight kits on E-bay

[Jmac05]

I can tell you exactly where to buy the LEDs for less than $1 a
piece. I can tell you where to get the bread board, the solder,
and wire. You'll probably pay about $60-$75 per set. Doing it
yourself may save some money, but that's if you know how to
wire them up. That doesn't include the components we add to
prevent the alternator, starter, or battery from burning out LEDs
because of too much current, or voltage. Even with all of
this, you'd be surprised how many come back with the boards
RUINED because someone thought they knew how to "tweak" it,
without screwing it up.
We have had to add a new warranty clause because of some of the
attempted mods some folks have tried. What Greyound Steve said
is accurate.