What is the duration of the low outlet on a lightweight portable oxygen bottle?

The duration of the low outlet on a lightweight portable oxygen bottle is 128 minutes. This duration represents the amount of time passengers can be provided with supplemental oxygen in the event of an emergency that necessitates its use.

Understanding the duration of supplemental oxygen is critical for flight attendants, as they need to manage resources effectively in case of an emergency. The lightweight portable oxygen bottles are designed to provide sufficient oxygen for several minutes while maintaining passenger safety.

The other answer choices represent durations that either exceed or fall short of the actual capabilities of the lightweight portable oxygen bottle's low outlet, which would not accurately reflect the operational standards set to ensure passenger assistance in emergencies.