How often should the power source of life jacket lights be replaced?

The correct answer is to replace the power source of life jacket lights on or before the expiration date of the power source. This is important because the effectiveness and reliability of life jacket lights are critical for safety in emergency situations. The expiration date is determined by the manufacturer and reflects the time frame in which the power source is guaranteed to function properly.

By adhering to the manufacturer’s expiration date, you ensure that the light will illuminate properly when needed, providing essential visibility for rescue operations. Regular checks and replacements based on this guideline help maintain the functionality of safety equipment, ensuring that it performs as expected in emergencies.

The other options, such as replacing the power source annually or biannually, may not align with the specific recommendations provided by manufacturers, which can vary based on the type and brand of the light. Replacing it more frequently than necessary can be wasteful, while ignoring the expiration date could lead to failures when the light is needed most.