Developed and delivered a new Lux sensor integration for the home-assistant/core repository, expanding the Airthings Cloud component to support ambient light measurement and enable advanced lighting automations. The work involved leveraging Python and IoT development skills to interface with the Airthings Cloud API, following established integration patterns to ensure maintainability and robust testing. By extending sensor coverage, the contribution improved observability and provided users with enhanced energy-management capabilities. The implementation emphasized clean commit practices and thorough PR workflows, resulting in a maintainable feature that increases data fidelity for lighting automation and supports more efficient, cost-effective smart home experiences.