The answer depends on the type of lights, and how you plan to use them. Generally, it is not recommended to leave landscape lighting on all night. Leaving your lights on for extended periods of time can lead to greater energy costs and potential damage to the lights.
If you do decide to leave your landscape lighting on all night, make sure it is a type of low-voltage lighting, such as LED or solar lights. Low-voltage lighting is designed to last longer and use less energy than traditional bulbs.