Finally made some progress on a little project I had in mind for a couple months. I bought an LED trailer light off Amazon ($11 and change) that runs off 9-16 volts to combine with a 4000 mAH battery I had laying around from my HID light that I don't use anymore. Finished the wiring yesterday with a three-way marine toggle switch, one setting for low (regular running light), another setting for high (brake/turn light switch). Used it for the first time today... it's very, very noticeable from a distance even on "low" due to the width of the light source. The "distance" shots really don't do the light justice, it's much easier to see than in the shots.
Light:
"Low" close
"Low" at a distance
"Low" at a distance cropped
"High" close
"High" at a distance
"High" at a distance cropped