These street lamps caught my eye. Each one has its own individual solar panel. I realised that I shouldn't be surprised because I have a solar powered light for going out to the garage. But I thought more about it: my garage light isn't on all night; it is only on when it detects me. So a closer look reveals that there is a PIR sensor on these as well. It means they only come on when necessary. It means solar power is adequate (and the use of LEDs allows this too) It also means that there is less light pollution. I found the company website.
