The common causes of damage to LED underwater lights

damaged pool light

Normally the service life of quality LED underwater lights is more than 50,000 hours so you don’t need to worry about the problem of lamp damage prematurely. In practice, however, there are many reasons why LED underwater lights can be damaged. Do you know how it happened? How to fix the problem and avoid making the same mistakes? This article will take you through these knowledge in detail.

The performance of LED underwater lights after damage

Different from traditional lights, when LED underwater lights have problems due to quality, production process and wrong use, in addition to not lighting up, it may also show that the brightness drops sharply(luminous decay), flicker, get water in or some of the LED chips do not light up.

Damage to the LED chips, burning or short-circuiting of other electronic components may prevent the underwater light from illuminating.

In the process of daily use, the brightness of LED lights will gradually decrease. This is the normal light decay phenomenon of LED lights, so do not need to worry too much. However, if the light decay occurs quickly, the lighting effect will decline faster, and the service life of the underwater lights will be greatly shortened.

The lighting components of LED underwater lights are LED chips, and the power of a single LED chip is not large. In order to improve brightness, LED lights will integrate multiple LED chips at high density. When the underwater light damage first occurs, maybe most of the chips can still work normally, only a few chips can’t emit light. The changes in the underwater lighting effect during this period may not be obvious, and you need to observe carefully to find the problem.

As you continue to use, gradually more chips go off. At this time of year, the overall illumination brightness of the underwater light decreases severely. The illumination light from the underwater light becomes uneven and seriously affects the lighting effect.

The main cause of damage to LED underwater lights

Water Leakage

Damaged or worn-out seals,incorrect installation, or cracks in the light housing can cause pool lights to leak. Water will cause moisture inside the underwater light. Electrical components that are damp when energized may be burned out by short circuit. Some burned out LED underwater lights will turn yellow or black.

water leakage pool light

The first thing we need to make sure is to buy good quality pool lights with IP68 protection to avoid water leaks.

If your pool light is already leaking, you can fix the problem by Replacing Faulty Seals, Reinforcing Electrical Connections, Resealing Pool Light Niches and more.

One of WAKING Lighting’s customers has also been plagued by water leaks caused by poor quality pool lights. The problem was solved after replacing it with one of our products.

Learn how WAKING helps customers solve the problem of underwater lamp burnout


Some manufacturers produce swimming pool lights with poor corrosion resistance.

Rusty stainless steel pool light

When the underwater light was first used, everything was normal, but the shell has begun to be corroded. The longer it stays underwater, the more serious the corrosion will be. When the corrosion is not severe, stainless steel pool lights just look rusty but they still work. As corrosion progresses, it breaks the airtightness of the light. Water enters the inside of the light body, causing the light to burn out.


LED lights have high energy efficiency, but they still generate heat. If the heat dissipation ability of the underwater light is poor, the LED chip will accelerate aging and reduce the service life.

Some people use ordinary underwater lights for hot pools, which is wrong. Ordinary underwater lights cause high temperature of the lamp due to poor heat dissipation. The heat dissipation design of the high temperature-resistant swimming pool light is better, and there will be no problems due to overheating.

Overhigh Voltage

Using a non-compliant voltage regulator will easily burn out the LED underwater light. Before purchasing a transformer or switching power supply, it is necessary to carefully confirm the relevant parameters of the input and output voltages to ensure that the total power of the transformer device is about 130% of the total power of all underwater lights.

Using Poor LED Chips

In order to earn more profits, some underwater light manufacturers use inferior LED chips to reduce manufacturing costs. The quality of these poor-quality LED chips is very unstable, and they are easily aged or damaged during use.

Short Circuit

A short circuit is a failure of a certain component or power line in the circuit, usually caused by poor quality accessories or irregular installation. Most of the time, the short circuit will burn out the circuit, and in some cases, the short circuit will also burn out the underwater light.

Static Electricity

The friction of clothing can generate static electricity and it tends to happen when the climate is dry. Although it is inconspicuous, the instantaneous maximum voltage may be as high as tens of thousands of volts. Static electricity is very small, and the discharge time is only microseconds.

People will generally only feel a very slight crackling sound and a slight feeling and will not be injured when hit by static electricity.

However, static electricity can easily penetrate electronic components. Electronics, including LED lights, can be damaged by static electricity.

How to deal with the damage of LED underwater lights?

When the LED underwater light is damaged, it is necessary to determine the cause first. If you don’t know how to judge, you can contact WAKING. We have professional engineers to help you find and solve the problem.

After finding out the cause, you can completely solve the problem by :

Guarantee Quality

Professional manufacturers will strictly control the quality of each component. They have mature and stable processing and manufacturing capabilities, and will conduct product testing uniformly according to standards. High-quality LED underwater lights and related accessories have complete certification. Try to buy products from specialist manufacturers, which not only guarantees quality but also saves on purchasing costs.

Standard Installation

It is best to carefully understand the relevant specifications before installation, and you can also ask professionals for help.

Proper Usage

Use it according to the design application scenario of the product. If you have other ideas, first confirm with the seller or manufacturer wheter it is feasibleh.

Attempted Repair

Electrical work requires knowledge of codes and safety precautions.

If you have enough experience, you can do it yourself. You need to prepare some common tools before that :

  • Gaskets or replacement seals
  • Screwdriver set
  • Electrical tape
  • Wire cutter or stripper
  • Multimeter (for testing electrical connections)
  • Waterproof silicone sealant

If you are not experienced, it is best to contact a professional.


For products that cannot be repaired, you need to buy new products for replacement. WAKING Lighting is a professional manufacturer of LED underwater lights. We have a wide range of products with high cost performance, welcome to contact us for the latest quotation.

The difference between LED lights and Incandescent lights

LED lights are very different from incandescent lights, so some common causes of damage to ordinary incandescent lights do not apply to LED lights.

The difference of luminous principle

The light-emitting part of the traditional incandescent lamp is the filament. When the current passes through the filament, it converts most of the electrical energy into heat and starts to emit light due to heating. After long-term use, part of the filament sublimates and deposits on the surface of the inner shell. Therefore, incandescent lamps gradually dim after long-term use, the filament becomes thinner and thinner, and eventually breaks and damages.

LED lights have no filaments, their light emitting parts are semiconductor materials, the temperature required to work is much lower than the temperature of incandescent bulbs. LED chips convert most of the electrical energy into light energy, generating less heat. And its heat conduction is fast, internal heat does not tend to accumulate in large quantities. Therefore, LED will not be as easy as incandescent lamps due to heat and reduce the service life.

The difference of effect of frequent switching

Frequent switching of lights is very harmful to incandescent lamps. The lamp draws maximum current when it is first turned on. When an incandescent lamp is turned on frequently, the filament is subjected to multiple current shocks in a short period of time. In addition, the rapid cooling and heating of the filament changes the material properties. Current surges and changes in material properties can easily cause the filament to blow.

LED lights have a better power supply/driver, which can stabilize the working current. In addition, the LED lamp itself is a semiconductor, the temperature required for operation is low, and the impact resistance is stronger.

Frequent switching will not significantly reduce the service life of LED lights. LED lights have rich luminous colors and can change different luminous colors through the controller to achieve rich lighting effects. You can use colorful LED underwater lights with confidence to make the lighting scene more shining.

Are you looking for a professional underwater light supplier? Contact us now!

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