When a vehicle's lights are **aimed too low**, an important effect occurs: **long-distance illumination is shortened**. This means that the driver will not be able to see objects or signs that are far away on the road well, which can be dangerous, especially when driving at night or in low visibility conditions.

- **Long-distance illumination**: The lights must be properly adjusted to provide good visibility at long distances. If they are too low, the light does not adequately illuminate the road ahead, limiting the driver's ability to react in time to any obstacle or sign.

- **Light adjustment**: It is crucial to keep the vehicle's lights well adjusted. If the lights are poorly adjusted, not only is long-distance visibility reduced, but there can also be a risk of glare if they are too high. However, in this case, the problem is that they are too low, which affects the driver's visibility.

Therefore, it is essential to ensure that the vehicle's lights are correctly adjusted to guarantee safe and effective driving.