What factors should I consider when choosing a solar street light for outdoor roads?

I'm researching solar street lighting solutions for outdoor roads and other areas where reliable lighting is required. I would like to understand which factors are most important when selecting a solar street light. For example, how should I compare LED wattage, solar panel capacity, battery capacity, operating hours and lighting coverage? Does the required specification change depending on whether the installation is for a residential road, industrial area, parking space or public road? I would also like to know what should be considered regarding pole height, spacing, local sunlight conditions and battery performance before selecting a system. Any practical recommendations or experience with solar street light installations would be helpful.