The answer to 'light fixture sparking' is that a sparking light fixture is a serious electrical issue that should be addressed immediately. Sparking can be caused by a wiring problem, a faulty fixture, or a short circuit. This is a fire hazard and requires prompt attention.
If you notice a light fixture sparking, turn off power to the circuit at the breaker box right away. Do not attempt to fix the issue yourself unless you have experience working with electrical systems. Sparking is a sign of an underlying problem that needs to be diagnosed and repaired by a licensed electrician. They can safely identify and resolve the root cause to prevent further damage or potential fire.