Google has introduced the Android 17 Beta 4 build for developers, which includes references to a potential new feature called Pixel Glow. This feature is expected to implement LED lighting on the rear panel of future Pixel smartphones, functioning as a notification system similar to older smartphones' front-facing lights. When the phone is placed face down, colored lights will alert users to incoming notifications. However, the feature will remain hidden when Flash notifications are activated. The code suggests that Pixel Glow will require specific hardware for the lighting effects and hints at various applications, such as subtle lighting for incoming calls and visual feedback during hands-free operations. Despite this exciting development, leaked renders of the upcoming Pixel 11, Pixel 11 Pro, and Pixel 11 Pro XL do not show any visible lighting hardware, raising questions about how Google plans to incorporate this feature.