The answer to 'why is my recessed lighting circuit overload' is that the circuit is drawing too much electrical current, causing the circuit breaker to trip. This is often due to too many recessed lights being installed on the same circuit, or a problem with the wiring or fixtures themselves.
Common causes of a recessed lighting circuit overload include: having too many lights on the same circuit, using lights that draw too much power, faulty wiring or connections, or a problem with the circuit breaker. Symptoms may include flickering or dimming lights, the circuit breaker tripping, or the lights turning off completely. To solve the issue, you may need to reduce the number of lights, use lower-wattage bulbs, repair any wiring problems, or upgrade the circuit breaker. If you are not comfortable troubleshooting electrical issues, it's best to call a licensed electrician to diagnose and fix the problem safely.