The average lifespan of ground mount floodlights typically ranges from 25,000 to 50,000 hours. This lifespan can vary based on several factors, including the type of bulb used, the quality of the fixture, environmental conditions, and maintenance practices. 
LED floodlights, which are commonly used due to their energy efficiency and longevity, often last between 30,000 to 50,000 hours. In contrast, traditional halogen or incandescent floodlights have a shorter lifespan, usually around 1,000 to 5,000 hours. Metal halide and high-pressure sodium floodlights, which are other alternatives, generally last between 10,000 to 20,000 hours.
The quality of the fixture itself also plays a crucial role in determining the lifespan. High-quality fixtures with proper heat dissipation and weatherproofing can significantly extend the life of the floodlights. Environmental factors such as exposure to extreme weather conditions, humidity, and temperature fluctuations can impact the longevity of the lights. Regular maintenance, including cleaning and checking for any damage or wear, can help maximize the lifespan of ground mount floodlights.
In summary, while the average lifespan of ground mount floodlights can vary, choosing high-quality LED options and ensuring proper installation and maintenance can help achieve the upper range of their potential lifespan.