Hi Jennifer. You can definitely use these outside. Just try to keep the actual plug sheltered under the cover of your outdoor outlet. Also, these should not be used for underwater illumination for obvious reasons. In the product description you will find the following info: "The copper wire (with LED light) is waterproof and can be used both indoor and outdoor without any worry of moisture or weather damage or short circuit....Note Both adapters and LED string light are waterproof. They can stand all kind of weather, including heavy rain and snow. However, because the wire joints are not completely sealed, we do not recommend full submerge in water or other liquids." The company provides a 12 month warranty should you have any issues. I hope this helps!