During a fire test, how many overhead lights are activated?

During a fire test on the Embraer Regional Jet (ERJ), six overhead lights are activated. This activation is part of the aircraft's safety systems designed to provide visual indications and guide crew members in the event of an emergency. The six lights are strategically placed to ensure adequate illumination of the cabin and assist in navigating to exits or performing necessary actions amidst a potentially chaotic situation.

This number of lights ensures that important areas are well-lit, helping to facilitate efficient evacuation or emergency procedures. The specific number is derived from rigorous safety standards that mandate sufficient lighting to aid passengers and crew in emergencies, making six the correct answer in this context.