Amjimshop Vovotrade(TM) Universal F1 Style Auto Car ATV SUV 12V LED Stop Fog Tail Brake Light Lamp(Red)
Works like its supposed to for a brake light. Bigger than I'd thought from the pics. Fairly bright output. Weird mounting bracket but I can make it work. Loong time coming tho. Don't know how water proof it might be for staying out in the weather on ATV, gonna Permatex (r) it just to make sure.  UPDATE  Been in use on ATV Quad for couple of months now and it looks good & works great.