Which method is NOT acceptable for verifying that the tower lights are functioning properly?

Regularly calling the local FAA flight service station is not an acceptable method for verifying that tower lights are functioning properly. While the FAA oversees aviation safety, they do not routinely verify the operational status of individual tower lights through phone calls. Instead, they rely on operators to conduct their own evaluations to ensure compliance with regulations. This method does not provide direct and timely confirmation about the status of the lights.

In contrast, visual inspection allows operators to directly observe whether the lights are on and functioning. Utilizing a light meter provides an objective measurement of the light's intensity, ensuring it meets the necessary visibility standards. Monitoring the tower's electrical system can help identify issues that may affect the lights but does not provide direct confirmation of their operational status. Therefore, relying on the FAA through phone calls is neither efficient nor reliable for this specific purpose.