Probably the benefits of solar can be summarised as follows:

- Security without power from the grid

- Illumination without power from the grid

- Green energy (no burning of fossil fuels etc)

- Low running cost (though upfront cost for may be huge)

Also, installation costs are almost zero. You don't have to build trenches, put in wires, no underground conduits from light to light etc. Solar lighting is the perfect lighting solution IMHO!

A couple of others:

- Solar lighting is low voltage making it incredibly safe

- Very easy maintenance

Also solar lights have very little impact on nature and parks

Another couple of advantages:

- Solar lights are not affected by extreme weather events like hurricanes which can bring down the power grid

- Solar lights obviously are unaffected by spikes (for example when a hue amount of people use air conditioners) in the power grid 

Someone has said similar re green energy, but a huge advantage of solar lights is zero emissions, so no impact on global warming!

Of course the most amazing thing about solar lighting is that it is an (almost) infinite resource. The power grid, often using coal and oil, is finite. 

Also safety - solar lighting is super safe for adults, children, pets and wildlife.

Here are a few more benefits of solar lights that are a little offbeat nut nevertheless important:

- Solar light are incredibly adaptable eg path lights, spotlights, flood lights, security lights

- Only solar lights can be really used for camping

- They are completely care free, you don't need to even care about turning them on and off!

Easy installation! Solar lights must be the easiest lights in the world to install!

Some benefits:
- Using solar energy is caring for the environment : Unquestionably, using solar lights plays a vital role in minimizing the carbon footprint formed by generating energy using non-renewable energy sources.

- Using solar lighting does not require high maintenance: Essentially, solar lighting systems are considered one of the painless to be sustained. Aside from performing a few inspections and cleaning annually, there are no other requirements for you to execute just to guarantee the longevity of your solar lights.

- You can enjoy a limitless source of solar energy: solar energy is unlimited. It is easy to acquire, and generating energy out of it is not a problem as long as you reside in an area where there is sufficient sunlight exposure.

As previously stated, solar lighting is available in several styles, functions, types, sizes, and shapes. Moreover, this is not merely manufactured to serve the functional applications, but also to be visually and aesthetically attractive.
You might already know that the range is excellent, and there is no question that you would sooner or later find an alternative that would precisely fit your specific requirements and expectations.