Bought a ton of these to experiment for an idea I had... ended up not using them. All tested and confirmed working. These can be wired to any 12v source - most people tap a headlight or foglight circuit, so it only lights up when those lights are on.
Can also be used with a BlueGhozt Plus to operate in strobe mode and/or control the brightness via a slider.
These do have some scuffs/swirls in the finish (from shipping) that are visible when you shine a bright light on them, but definitely not visible once installed the car. Probably can be buffed out if you're picky.