As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL BELOW 60 KNOTS, ALL INSTRUMENT LIGHTS FLICKERED ON AND OFF. MOMENTARILY BOWTIE LIGHTS AND MASTER CAUTION FLICKERED WITH OTHER LIGHTS. ABORTED TAKEOFF AND RETURNED TO THE GATE. MAINTENANCE REPLACED THE LEFT GENERATOR CONTROL RELAY AND CROSSTIE RELAY. OPERATIONAL CHECK OK.