It depends. One of the reasons why many highways don’t have street lights is that they may cause glare, leading to eye fatigue. Besides, it is too expensive to install so many street lights on the highways. Sometimes the car headlights are enough. But other times, on roads without direction division and with dense traffic, having street lights is better.
I want to prevent the influence of voltage drops, so I am considering using 480 V. Is it a good idea?