@Tapoh123 

Actually, for any WiFi device, the signal is highly susceptible to interference and degradation in metal-rich environments, whether enclosed or semi-enclosed. The user guide for this product explicitly states: “NOT for use in totally enclosed or recessed luminaires.”

• Tapo L630(EU)_V1_User Guide

If your environment or the intended installation location contains significant sources of WiFi interference, such as metal shielding in the structure, thick concrete walls, or similar obstacles, it's best to add WiFi extenders to strengthen coverage. For devices that support wired connections, use Ethernet whenever possible. While environmental conditions may be difficult or impossible to change, these steps can still effectively help mitigate signal interference in such settings.