When preflighting the lights on the FA Panel, which lights must you test?

When preflighting the lights on the FA Panel, it is important to test all lights to ensure safe operation and compliance with regulations. The testing process should include the ceiling lights, sidewall lights, galley lights, and dome lights.

Ceiling lights are crucial for overall cabin visibility, while sidewall lights provide illumination along the walls, helping passengers navigate the aisles. Galley lights are important for the crew's operations in the food preparation area, and dome lights are typically used for passenger entry and general cabin illumination. By testing all these lights, flight attendants ensure that they are fully functional and ready for use in various scenarios, including emergencies where adequate lighting can make a significant difference in safety and efficiency during evacuations or other situations.

Thus, option C is correct because it encompasses all the necessary lights that need to be checked in the preflight inspection.