The answer to 'why is my landscape lighting bare spots' is that there are several common causes, including improper installation, damage to wiring, and issues with the lighting fixtures themselves. Bare spots in your landscape lighting can be caused by loose or damaged wiring, which can lead to the lights not turning on in certain areas. It could also be due to malfunctioning fixtures or a problem with the power supply.
If you're experiencing bare spots in your landscape lighting, the first step is to inspect the wiring and fixtures to identify the root cause. This may involve checking for loose connections, damaged wiring, or issues with the lighting fixtures. In some cases, you may be able to make minor repairs yourself, but for more complex problems, it's best to call in a professional landscaping technician who can properly diagnose and fix the issue.