Yes, LED wall washer lights can be used both indoors and outdoors. LED wall washers are designed to project a broad, even wash of light onto walls, creating a visually stunning effect. They are available in both waterproof and non-waterproof versions, making them suitable for both indoor and outdoor use.

For indoor applications, LED wall washer lights can be used to highlight architectural features or artwork on walls. In outdoor applications, they can be used to light up the exterior of a building or landscape features such as trees, gardens, and statues.

It's important to choose the right type of LED wall washer light for your application, as outdoor versions are typically designed to be more weather-resistant and durable than indoor versions. Additionally, outdoor LED wall washers may need to be wired differently to account for the possibility of water exposure.

It's always a good idea to consult with a lighting professional or the manufacturer of the LED wall washer lights to determine the best type of light for your specific application.