The LEDs are designed for an operating temperature of -20 °C to a maximum of 45 °C. As the temperatures in a sauna are often above 45 °C, they are not suitable for the sauna area. Even if you install them behind the benches, where it is slightly cooler, the heat can affect their service life and function. The Outdoor Lightstrip is not designed for the high temperatures in saunas and should not be used there.