WELL....the led's draw more amp's than the regular bulds...if your running the old stock alt a up grade there will help for sure...could be a ground problem.
i have a 94 amp camaro internal regulated alt conversion on my truck..
my lights are brighter, wipers run faster, really step's things up...
MORE POWER SCOTTY...
MORE POWER O,O,O,O,O,O,O
make sure your sockets are clean and not rusty...
yea and they could be crappy bulds