Samsung's in-built Edge Lighting + Infinity makes a powerful and reliable LED notification system for your device. NO Always On Display (AOD) hack. NO Screen Overlays. NO Wake Lock. NATIVE Edge Lighting triggered by this App is as pure and efficient as it can get for a reliable LED notification system. By default, Edge Lighting on your Samsung Galaxy device lights up only once per unread notification for a limited duration (between 4 - 8 seconds maximum.) Edge Lighting Infinity features: