The other day I followed a truck that utilized LED brake lights and turn
signals.  Plenty bright even in direct sunlight.  Don't know if these are
special high brightness led's, but they would make a good 7 segment sign.
They appeared to be about 3/8" in diameter and were red.  The turn signal
arrow was made up of 11 LEDS, and was about 4" x 3".  Really looked good.

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