That's pretty cool, but even if we converted every single one we'd still be lacking. My street has a car to streetlight ratio of 10 or 15 to 1. Even if the cars only needed to be charged once a week, and everyone was very good at coordinating to allow cars needing charged to be parked next to the streetlight, that would still only work for half the cars parked. There's vast swathes of UK cities - especially the highest density most polluted ones - which have the same problem.

I used these every week. It works great. https://www.ubitricity.com/en/