What to Do When LED Bulbs Keep Burning Out?
3 Answers
LED bulbs frequently burning out may be due to an abnormal low beam relay, which can be resolved by replacement. Below is relevant information about LED bulbs: Basic Definition: LED bulb is the English abbreviation for light-emitting diode, abbreviated as LED, which is a common term. Luminescence Principle: The terminal voltage of the PN junction forms a certain potential barrier. When a forward bias voltage is applied, the potential barrier decreases, and the majority carriers in the P and N regions diffuse toward each other. Since electron mobility is much greater than hole mobility, a large number of electrons diffuse into the P region, constituting minority carrier injection into the P region. These electrons recombine with holes in the valence band, and the energy obtained during recombination is released in the form of light energy. This is the luminescence principle of the PN junction.
The LED bulbs on my car keep burning out, which is quite annoying. I specifically consulted a mechanic and found that the main issue might be voltage instability. It's recommended to first measure the voltage output from the alternator—if it exceeds 15 volts, it can easily burn out the bulbs. Poor wiring connections are also common, as loose plugs can cause sudden current surges. Another issue is heat dissipation, especially with cheap LED lights that don't have fans—they can get too hot to touch after just half an hour of use in summer. I later switched to a mid-range brand with copper-based heat sinks and made sure the installation location had good ventilation, and they haven't burned out in over a year. A practical tip is to avoid using high-pressure water jets directly on the gaps of the light housing when washing the car.
I've encountered the issue of LED bulbs burning out several times. First, let's talk about voltage problems. When the vehicle is idling, the voltage is generally around 14 volts. If it exceeds this value, the voltage regulator needs to be replaced. Next, check if the wiring connections are loose, as oxidized or blackened contact points can also cause poor contact. Heat dissipation is crucial. I've compared different styles of LED lights, and those with aluminum heat sinks are much more durable than those with ordinary plastic bases. During installation, make sure the driver module doesn't come into contact with other components, as this can affect heat dissipation. Another issue is the current surge during switching, which can be resolved by adding a soft-start circuit module. I recommend troubleshooting from these aspects.
