its a inexpensive way to steer thieves to easier prey,,,maybe! I had one on my old scooter and can say it would make anyone think it was (alarm) armed. Yes, they sell the LED on eBay!Get two in case you goof up the first one.
Hardly any drain on battery. Get the kind that has the metal frame with a backup nut (not the push in type).
Most of it can be wired near the ignition switch. Also mount in an area that doesn't catch water (rain).By that , I mean not in horizontal area such as floor board but vertical area such as ignition switch. The Led is bright enough to see in daylight.Good luck! Video says it all.