When decorating your home it's important you select the right lights for the right location. It's fine to use outdoor lights inside, but you should never use indoor lights outside. When the season is done, label your lights with exterior vs. interior to avoid safety issues the following season. Outdoor Lights have a heavier duty wire coating and a seal on the bulb socket. The seal on the bulb shields the electrical components from moisture and weather. Always follow manufacturers instructions before using any product. For more helpful tips and advice visit your neighborhood Ace or visit us online at acehardware.com.