Why Condensation Builds Up in Outdoor String Lights and How to Prevent It

Why is there water in my outdoor string light bulbs?

Have you noticed condensation building up inside your outdoor string light bulb(s)? This is a common issue that can affect the longevity and performance of your lights. Let's dive into why this happens and what you can do to prevent it, along with tips on proper storage, especially if you live in an area with extreme weather conditions.

Why Condensation Happens

1. Temperature Changes:

Condensation often forms when there's a significant difference between the temperature inside the light and the surrounding environment. For example, if your lights are on during a cold night, the warmth from the bulbs can cause moisture in the air to condense inside the light casing. i.e. water in the bulb.

2. Humidity:
High humidity levels can lead to condensation as well. Moisture in the air can seep into the lights and condense when the temperature drops.

3. Bulb Not Screwed in Tight Enough:
To help prevent moisture from getting inside your outdoor string lights, make sure each bulb is screwed in tightly. This helps create a secure seal that keeps water out, ensuring your lights stay bright and functional. If the bulbs are loose, water can seep in, leading to potential damage. So, give each bulb a quick twist to make sure it's snug and secure!

Usage & Tips

1. Store Properly:
When not in use, especially during extreme weather conditions, store your string lights properly:

• Clean Before Storing: Make sure the lights are clean and dry before storing them.
• Use Airtight Containers: Store the lights in airtight containers to keep moisture out.
• Cool, Dry Place: Keep the containers in a cool, dry place to avoid temperature fluctuations that can lead to condensation.

2. Remove and Clean:
After the season or when extreme weather is approaching, take down your string lights. Wipe them down with a dry cloth to remove any dirt or moisture.

3. Coil Carefully:
Coil the lights carefully to avoid tangling and damaging the wires. You can use twist ties or zip ties to keep them secure.

4. Use Silica Gel Packs:
Place silica gel packs in the storage container with your lights to absorb any moisture that might be present.

5. Label and Organize:
Label your storage containers for easy identification next season. Organizing your lights properly can prevent damage and prevent someone mishandling the lights.