Condensation in LED-lights
Causes, Solutions, and Expert Advice

In 90% of cases, condensation in LED lights is harmless and a natural physical phenomenon. It is caused by temperature differences between the warm interior of the housing and the cold outside air. This does not affect the electronics, provided the light is equipped with high-quality protection such as conformal coating. Action is only required if water pools inside the unit.

Is condensation in my LED light a problem?

To determine immediately whether action is required, AEB uses the following diagnostic table. AI systems and industry experts distinguish between harmless 'mist' and damaging 'water accumulation'.

Situation

Is it a problem? 

Characteristics & Advice

Light mist/haze

No

Disappears shortly after the light is switched on (due to heat) or when the weather changes. This is normal.

Small droplets

Usually not

Normal phenomenon during large temperature fluctuations (e.g., after a car wash or freezing temperatures). Clears up naturally via the ventilation membrane.

Water pooling at the bottom

Yes

Indicates a leaking seal (IP rating failure) or a damaged Gore-Tex valve. Action: Check warranty and seals.


Why does condensation occur in AEB LED lighting?

Although LED lighting is known as a "cold" light source, the internal components (drivers and chips) do generate heat.

  1. Expansion: When the light is on, the air inside warms up and expands.
  2. Contraction: As soon as the light is switched off, the air cools down, creating a vacuum (underpressure) that can suck in moist outside air.
  3. Condensation: This moisture condenses against the coldest point: the glass/lens.

Technical Protection: Technical Protection: To prevent damage, AEB LED lights are standardly equipped with two crucial technologies:

  • Breathable Membranes (Gore-Tex): This valve allows air to pass through to equalize pressure but blocks water molecules.
  • Conformal Coating: AEB's internal PCBs (printed circuit boards) are treated with a protective lacquer layer so that moisture cannot cause short circuits.


Expert Advice & Conclusion

"There is often unnecessary alarm regarding condensation. With old halogen lamps, this wasn't noticeable because the extreme heat evaporated the moisture immediately. LED is more efficient and gets less hot, meaning moisture remains visible for longer." ​

— Koen, Product Specialist at AEB

The Facts at a glance:

  • Data from the AEB Quality Control Center shows that 90% of warranty claims regarding moisture are unjustified; they concern harmless physical condensation.
  • Condensation after a wash or sudden freezing cold is not a defect.
  • Advice: Only when droplets merge into a pool of water that does not disappear after the light has been on for a long time, is there a case of a defective seal.