As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPT REPORTED, EMERGENCY LIGHT CAME ON IN FLIGHT AND WENT OUT AND CAME ON AGAIN AND REMAINED ON AND LOST EMERGENCY BUSS. LT GENERATOR VOLTAGE NORMAL. C/W QRH PROCEDURES AND DIVERTED TO PIT. NO EMERGENCY DECLARED AND NO FURTHER INCIDENT. ISSUED SPECIAL FERRY PERMIT TO JFK WHERE REPAIRS CAN BE MADE. REMOVED AND REPLACED EMERGENCY POWER SUPPLY, OPS CHECK GOOD.