I have had my lights since 2008 no problems with any of them, except when a rock hit one LED bulb and knocked out all four LED bulbs on the assembly.I believe the 4 LED the lights on the assembly run in series so if one goes out they all go out.Check to see if one of the LED wobbles.Last edited by dblplasabre on February 28th, 2012, 2:35 am, edited 1 time in total.