I have the Kisan Tailblazer plug-in brake light modulator. They sell an LED lamp replacement which I tried, but it is very disappointing. It is a flat disc and only shines straight out in one small area so it's much dimmer than an incandescent which fully utilizes the reflector to illuminate the lens. There are many LED replacement lamps out there, if you try one (I think the stock is an 1157 lamp) be sure to get one that has LEDs all the way around as well as on the end.
2014 V-Strom 1000 - Desert Khaki
2011 Burgman 400
2007 Honda Helix
2013 V-Strom 650 - sold