The answer to 'landscape lighting thin grass' is that landscape lighting can be a common cause of thin, patchy grass. The heat and intensity of landscape lighting, especially if placed too close to the grass, can stress and damage the grass, leading to thinning and bare spots.
Other potential causes include poor soil quality, lack of nutrients, compacted soil, and improper mowing or watering practices. If the thin grass is limited to areas around landscape lighting fixtures, the lighting is likely the primary cause. In this case, you may be able to remedy the issue by adjusting the placement or type of lighting to reduce the impact on the grass. However, if the thin grass is more widespread, it's best to consult a professional landscaper to diagnose and treat the underlying issues.