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What Causes LED Headlights to Flicker When Starting?

1 Answers

DelJohnny

07/29/25 2:47pm

LED headlights flicker when starting due to the following reasons: 1. The LED beads do not match the LED driver power supply. Normally, a single 1W LED bead can withstand a current of 280-300mA and a voltage of 3.0-3.4V. If the LED chip is not rated for full power, it can cause flickering. If the current is too high, the LED bead may turn on and off repeatedly. In severe cases, the built-in gold or copper wires inside the LED bead may burn out, causing the LED to stop working. 2. The driver power supply may be damaged. Simply replace it with a good driver power supply. 3. If the driver has an over-temperature protection function and the heat dissipation performance of the lamp material does not meet the requirements, the over-temperature protection will activate, causing the light to flicker. For example, using a 20W spotlight housing to assemble a 30W lamp without proper heat dissipation can lead to this issue.

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