How to Choose a Reliable Solar Street Light for Outdoor Areas?

I am researching solar street lighting solutions for outdoor areas such as industrial premises, factory roads, parking areas, residential societies and public spaces.

What factors should be considered when selecting a reliable solar street light? I would like to understand the importance of solar panel capacity, battery backup, LED efficiency, lighting coverage, weather resistance and maintenance requirements.

Also, what should buyers check when comparing a solar street light manufacturer in India or a Solar Street Light Supplier in India? Is it better to focus on product specifications, warranty, installation support and after-sales service rather than only comparing prices?