Narrative:

Electrical emergency abnormal/emergency lights not armed messages appeared at stair step level off at 5;000 feet. Notified ATC of the emergency [and] immediate return to [departure airport]. Identification: master caution.

Google
 

Original NASA ASRS Text

Title: EMB-145 First Officer reported returning to departure airport after receiving an 'Emergency Lights Not Armed' Master Caution message.

Narrative: Electrical emergency abnormal/emergency lights not armed messages appeared at stair step level off at 5;000 feet. Notified ATC of the emergency [and] immediate return to [departure airport]. Identification: Master Caution.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.