Question: Can the sensor light be turned off? The sensor light remains off during normal operation. It does not emit any light at night, ensuring a peaceful sleep environment. When you touch the button, the light briefly turns on for a few seconds to indicate the sensor’s status. Question: How to purchase accessories and what is the lifespan of the filters? You can search for ""LEVOIT Sprout Filter"" to purchase the replacement filters. The filters typically last for more than 3 months under normal use. You can also track the filter usage progress through the VeSync app. Question: What color is the Sprout Evaporative Humidifier? When the light is off, the Sprout`s tank is blue. When the light is on, the light intensity can be adjusted from 2000K to 3500K, transitioning from orange to soft beige, providing a warm and comforting ambiance. LEVOIT Sprout Evaporative is dedicated to providing comfort for babies and supporting their healthy growth! Tips: 1. The humidifier’seffectiveness may be limited in reaching another floor or a separate room. Forbest results, we recommend placing the unit in the specific room wherehumidification is needed. 2. Arid environments or higher temperatures mayreduce the overall runtime to some extent. 3.Runtime performance may vary depending on the selected mist level. SleepMist Level: Up to 39H Min MistLevel: Up to 27H Mar MistLevel: Up to 12H 4. To ensure thebest user experience, we recommend upgrading to the latest firmware as soon asthe device is connected to Wi-Fi.