For House Wiring Circuit Breaker. And make sure all other lights are off or the bulbs are removed. If the breaker trips with all loads removed then you probably have a short somewhere in the house wiring.
Remove the covering from one of. The white wire goes to the common bond rail in the box. To find the cause remove all loads from the circuit.
Take the cover of the breaker box off.
Start with all the breakers off and plug a lamp -- turned on -- into an outlet. This is a video on how to install a single pole 20 amp overcurrent protection device. Unplug all lamps TVs fans etc. Standard circuit breakers monitor amp capacity of the devices they operate.