@riley @davidho

I think there's assumptions made that need unpacking. Yeah the original filament lamp was probably 100 to 500 watts. The led a tenth that, let's say. 500 - 50 is 450.

Not enough to charge a car.

But the street power run to that pole is likely 230 or 477 volts or whatever, outside the US. It's probably fused for 10 amps for safety.

230 * 10 is 2300 watts potential maximum.... A lot of power but probably a 12 or 24 hour charge time. So not so good for an hour or two roadside park charge.

Also the whole streets lighting budget derives from the same circuit, so each pole, if indeed each is fused for 10 amps for safety (shorts etc) likely the street is fused/limited to N lamps times M amps with a safety margin.

Bicycle chargers maybe, but they have the same charge time (slow) issues.

I'm winging it on the numbers, but I bet they're within 50 percent.