Although LED is more energy efficient than traditional lights and we can’t avoid using them, these buzzing and flickering noise can be downright frustrating. Under powering your lights, such as using a 12-Volt driver for 24-Volt strip lights, is likely to cause your lights to flicker, dim, or not light up at all. My circuit works by rectifying and filtering the AC power into a DC source. What happens if you overload an LED power supply? In both cases, you will need the help of a professional electrician. Buzzing or flickering noise on LED lights isn’t an isolated problem but rather a common problem on these types of bulbs. (They don't flicker in other rooms/circuits.) The lighting industry has waded through the often-choppy, often-murky waters of LED dimming over the last several years and, while a lot of the problems have been solved, flickering and strobing and early burnout still happens all the time. If your LED strips are losing brightness across the entire strip, this could be caused by two issues: 1) Input voltage into the LED strip has dropped below the designed voltage To determine which of these two issues is to blame, first determine the input voltage at the point where the LED strip is connected to the power supply (i.e. The important thing then when your lights start flickering, is not to ignore them. But note that my circuit makes a complete RC filter, with a capacitor (C) and a lamp to serve as the resistor (R). The lights flicker at different "flicker frequencies" as you can see in the videos. In fact, fixing them is a relatively straightforward job, here is how to do it. Your LED bulb might be flickering due to loose or incorrect wiring, incompatible dimmer switches, or bulb components such as a defective LED driver. Because of the very low load presented by an LED string, this reduces the flicker. This can not only be very irritating but will probably mean sooner or later you are going to be left in the dark. The good news is that the flicker is most likely not caused by the LED strips or other components, so your replacement costs will be limited to the PWM dimmer / controller. Vice versa, overpowering your rope lights will make your lights hot to the touch, ultimately causing the wiring to fry and your lights to fail. Constant-current drivers help avoid any peaks in the current wave, eliminating any flickering. The low frequency of less than 50 Hz makes the LED bulb flicker. LED Lights Flicker Without Dimmer. The problem of flickering LED lights even when they are switched off can be solved either by ensuring that the wiring is earthed properly or by installing an anti flicker component or Zener diode. When you overload your power supply by drawing too much wattage from the output, your LED strip lights will begin to flash in a consistent pattern. 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