Light-sensitive alarms are devices designed to detect changes in light levels. They typically use a sensor that responds to variations in brightness, triggering an alert when a specific threshold is crossed. These alarms are commonly used in security systems to detect unauthorized entry or in environmental monitoring to track changes in natural light. These alarms can be found in various applications, including home security, smart lighting, and agriculture. For instance, in greenhouses, light-sensitive alarms can help manage conditions for plant growth by signaling when to adjust artificial lighting. Their versatility makes them valuable tools in both residential and commercial settings.