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The 12mm LDR operates similarly to the 5mm version but has a larger surface area for improved sensitivity. It is designed for applications that require precise light detection and automatic control. The increased size allows it to detect lower levels of light more effectively, making it suitable for industrial automation, streetlights, and power-saving systems. The LDR is frequently used in energy-efficient appliances to optimize power consumption. It is commonly integrated into IoT devices for smart environmental monitoring. The 12mm LDR is an essential component for solar power systems, where it helps adjust solar panel orientation for maximum efficiency. It can be used in security alarms to detect light interruptions and trigger alerts.