The answer to 'landscape lighting yellowing' is that the yellowing of landscape lighting is often caused by exposure to UV rays from the sun, which can break down the plastic or metal components over time. This can result in a yellowish or discolored appearance on the light fixtures.
Common symptoms include faded, discolored, or cloudy-looking light fixtures. Solutions may involve replacing the affected parts or the entire fixture, and using UV-resistant materials in future installations. In many cases, it's best to have a professional landscaper or electrician diagnose and address the issue to ensure the lighting is repaired properly and safely.