Why Do My LED Lights Flicker And How To Stop It?

Nothing makes space go from splendor to squalor quicker than a flickering bulb.

It’s one of those things that you want to get fixing right away, so here’s a quick rundown of the reasons why your LED might be malfunctioning.

It’s useful to know that LED functions as a computer. It has a binary on and off status and no persistence like traditional light bulbs.

So if the on/off cycle, powered by mains alternating current (AC), is not functioning well, then the human eye sees the LED rapidly turn on and off, which we call flickering.

There are several reasons why the bulb is behaving this way, but mainly:

The low frequency of less than 50 Hz makes the dimmable led flash. Your LED bulb might be flickering due to loose or incorrect wiring, incompatible dimmer switches, or bulb components such as a defective LED driver.

LED Lights Flicker Without Dimmer

To cut to the chase, three points of fault usually make lights flicker. The fault could lie in the LED bulb, in the wiring, or in the current regulation.

Sometimes a short wire length within the light fixture could be at fault. It is a good practice to have all wires at least 6” long. Loose wires connecting the bulb, fixture, and switch could all be reasons for a sudden onset of flickering in your LED light bulbs.

The bad LED driver components that could not withstand the sustained heat from the other internal components. Suppose it’s your hobby to crack open electrical components to see what went wrong. In that case, you should be looking for a swollen or bulgy capacitor.

Here’s a video demonstration of how to swap out a bad capacitor in your LED lamp.