As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FA REPORTS NUMEROUS OVERHEAD EMERGENCY LIGHTS FLICKER INTERMITTENTLY THROUGH OUT CABIN WHEN IN THE ARMED POSITION. GROUNDED - YES. ACCOMPLISHED B737-900 FIM 33-50 TASK 801. EMERGENCY LIGHTING TROUBLESHOOTING. EMERGENCY LIGHTS OPS TEST NORMAL.