Definition
The peak voltage in, for example, work lights refers to the maximum voltage measured during a single full cycle of alternating current. This peak voltage value determines the intensity and brightness of the light produced by a light fitting.
How do you recognise peak voltage?
High peak voltages result in clearer light, while lower peak voltages result in weaker lighting. In most cases, peak voltage values are kept within a certain range for safety and efficiency reasons. Peak voltage is a sudden increase in voltage that can damage electronic components. It can be caused by a number of things, including faults in the electrical system, operating conditions outside the normal range or even faulty wiring.
So what happens when high voltage occurs inside your light?
When peak voltage occurs, it can damage or destroy sensitive electronic components such as LEDs. This is why it is important to install a voltage regulator if you have LEDs in your headlights or use lights that can withstand it. In general, peak voltage is a crucial aspect to consider in lighting. Proper management and regulation of peak voltage can ensure the safety and efficiency of your lighting system.
If your car's lighting ever dimmed or even went out while you were driving, it is probably due to a surface mounting of peak voltage. While this may not seem like a big deal, peak voltage can damage the LEDs in your cars' lights, causing them to burn out prematurely. In this blog post, we explain what peak voltage is and how it can damage your LEDs. We also give some tips to prevent peak voltage from damaging your lights.

How do you prevent peak voltage from damaging your vehicle's lighting?
There are a few things you can do to prevent voltage from damaging your vehicle's LEDs, namely:
- Use a surge protector: A surge protector helps protect your LEDs from high-voltage spikes by absorbing the energy of the peak and safely dissipating it
- Use low-voltage LEDs: Low-voltage LEDs are designed to withstand higher levels of voltage than standard LEDs. By using low-voltage LEDs in your vehicle's lights, you can help extend the life of your lamps
- Replace damaged components: If any of the components in your vehicle's lighting system are damaged, they should be replaced as soon as possible. Damaged components can cause high voltage spikes that can damage your LEDs
Case study:
Peak voltage can, for example, occur in driving lights with warning light functions due to the rapid switching actions required for flashing. It is crucial that these driving lights are designed with protective mechanisms to minimise the effects of peak voltages, ensuring they remain durable and reliable under variable conditions.
Conclusion
Peak voltage can be dangerous to the long-term health of your vehicle's LEDs. By taking some simple precautions, you can help prevent peak voltage from damaging your lights. If you suspect your car's lighting has been damaged by high voltage? Then make sure you get them checked by a professional as soon as possible.
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Author
Kevin van Mierlo
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