The 12V LED driver is one of the most important components in your 12v LED light system. Not only does it provide power to your LEDs, but it also regulates the amount of power needed to run them. Here are four signs that indicate you need new 12V LED drivers: 1. You Need New 12V LED Drivers If The Light Flickers Or Fades If you have a flickering or fading light, then there's a chance that your driver is starting to fail.