How do I choose a reliable solar street light manufacturer in India for a project?

I am researching solar street lighting options for outdoor projects in India and wanted to understand what factors should be considered before selecting a manufacturer.

There are many companies offering solar street lights, but the specifications and configurations can vary considerably. I am particularly interested in understanding how to compare a solar street light manufacturer in India beyond just the quoted price.

For example, how important are the following factors?

Solar panel type and capacity
Battery technology and storage capacity
LED efficiency and lighting output
Expected backup hours
Controller quality
IP rating and outdoor protection
Pole height and spacing
Installation requirements
Warranty and after-sales support

I have also seen both All-in-One and Semi-Integrated solar street lights. In your experience, which configuration is more suitable for roads, residential societies, industrial areas and commercial properties?

It would be useful to hear from people who have actually purchased or installed solar street lights in India. What specifications or questions should a buyer check before finalizing a manufacturer?