Wall Washers are a great way to make a room feel more spacious or help you see where you’re going. When shopping for Wall Washers, keep in mind that they come in two main types: Low Voltage and High Voltage. Low-voltage lights generally use LED bulbs that last longer and use less energy. They are also safer than incandescent bulbs because they do not produce any heat.
Source: https://techcrams.com/how-choose-perfect-wall-washer-light/