Hi @hugopua
Sorry to hear that your experiencing issues with your Dyson product.
The Dyson Light cycle gradually reduces the brightness for 30 minutes. It helps to calm down and prepares your body for restful sleep.
The buttons are to adjust the brightness or colour temperature.
The motion sensor is switched off in this mode so this possibly could be the reason for your issue.
The best way forward on this issue is to get in contact with the Dyson customer service team and speak to a Dyson Virtual Service Engineer.
The Guides and manuals link should take you through to your local Dyson website. Here, you'll need to navigate to the ‘Support’ page and scroll to the ‘Contact Us’ section.
The ‘Contact Us’ section host the primary contact methods for each market, universally this is WhatsApp but it can vary per market.
Thanks,
Jodey