--- title: What do the different colored lights on the device mean? description: "Colored lights indicate status: flashing red means emergency stop, solid red error, yellow therapy active, blue Bluetooth connected, white standby, and moving blue lights show software updates." --- [Skip to content](https://help.solius.com/faq/what-do-the-different-colored-lights-on-the-device-mean#main-content) [![sol-logo-primary-rgb-reg-black - email small](https://help.solius.com/hs-fs/hubfs/sol-logo-primary-rgb-reg-black%20-%20email%20small.png?width=148&height=30&name=sol-logo-primary-rgb-reg-black%20-%20email%20small.png)](https://solius.com?hsLang=en) - [Get Started](https://www.solius.com/get-started) - [User Manual](https://www.solius.com/user-manual) - [Clinical Research](https://www.solius.com/research) - [Contact Us](https://www.solius.com/contact) Open main navigation Close main navigation - [Get Started](https://www.solius.com/get-started) - [User Manual](https://www.solius.com/user-manual) - [Clinical Research](https://www.solius.com/research) - [Contact Us](https://www.solius.com/contact) How can we help you? - There are no suggestions because the search field is empty. 1. [Solius Knowledgebase](https://help.solius.com/faq?hsLang=en) 2. [Setting Up Solius](https://help.solius.com/faq/setting-up-solius?hsLang=en) # What do the different colored lights on the device mean? Solius uses different colored lights across the top of the device to communicate information about the device status. The device has the following color indicators: - Flashing Red: Emergency stop button is pressed. - Solid Red: Device is in error mode. - Yellow: UVB therapy is in progress (the UVB lights are not visible). - Blue: Device Bluetooth is connected to the Solius mobile app. - White: Device is in stand-by mode and waiting for Bluetooth connection. - Blue Lights Increasing Left to Right: Device software update in progress. [![Group 3-2](https://help.solius.com/hs-fs/hubfs/Group%203-2.png?width=195&height=50&name=Group%203-2.png "Group 3-2")](https://www.solius.com?hsLang=en) Solius is an FDA-cleared over-the-counter (OTC) UVB light panel intended to stimulate production of vitamin D in people 22 years and older. Solius is clinically proven to stimulate the production of vitamin D. References to the benefits of sunlight, UVB light, and vitamin D are based upon published, peer-reviewed research. The Solius device is not intended to diagnose, treat, cure, or prevent disease, except for the indications for use described in the user manual for your applicable region. Solius does not provide specific medical advice to users. Users should seek advice from a qualified physician or healthcare provider. This website does not establish a doctor-patient relationship. For detailed product information please consult the User Manual prior to use. Solius® is a registered trademark of Solius Labs, Inc., 100 Ravine Lane NE, Suite 310, Bainbridge Island, WA 98110 © 2026 Solius Labs, Inc.