How long must you hold the High Visibility LED to activate it?

The correct choice indicates that you must hold the High Visibility LED for 2 seconds to activate it. This timing is crucial for preventing accidental activation; it ensures that when you intend to use the light, you have made a deliberate action, minimizing the chances of it turning on inadvertently. This mechanism enhances safety and ensures that the LED is used deliberately only when necessary. Understanding the activation duration is essential for efficient operation in emergency situations, where every second counts, and a clear, functional response is required.