Have a look at This!

Surely they can fit dual lamp streetlights or only switch every other one off? Instead of leaving whole villages in blackout like during the war!

but what about crime whould it go up ? i know there are still debates about if streetlighting cuts crime i think it does less places to hide and u can see movement. since i installed my moms gumball last year less people hang out front and its only a 175 watt clear merc  maybe i should jump up to 250

There's more about it here

To turn off all the Streetlights is the absourdliest idea I ever heard!