An electric bicycle or scooter has a big battery, so it might as well have bright lights. Bright lights help you see the road, and they help you to be seen by car drivers, considerably improving your safety. Even during the daytime bicyclists are practically invisible and need to use every trick available to be seen, to give the highest chance to avoid a car accident. At night it's even worse, because the bicyclist can easily blend into the shadows and not be seen until its too late.
The Vespa 50S Special originally had a 6V 15W headlamp. The old lens was partially obscured with overspray from past rattlecanning, but the previous owner gave me a brand new headlamp when I bought the scooter from him.