As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURN BACK DUE TO EMERGENCY LIGHTS FLICKERING CONTINUOUSLY IN ARMED POSITION. AIRCRAFT LANDED WITHOUT INCIDENT AT KCGF. REMOVED FORWARD AND AFT EMERGENCY LIGHT POWER SUPPLIES AND INSTALLED TESTED POWER SUPPLIES. NO DEFECTS NOTED. FORWARD P/N 6450LS-00 S/N 001691; AFT P/N 6450LS-00 S/N 002518.