Form Follow Sun / Bushaltestelle

There are many bus stop shelters among the cities. It's well-sunshined everyday, and at night, it glowing for the people who are waiting for the bus. So, why not we apply the solar energy on the shelters?
Modulize the solar battery, follow the bus stop's position and the sunshine position, so the entire shape of each the selter may different.
That would be very eco when every stop shelter the solar battery charge in the day, and glowing at the night.