This was why most microcars had 12 volt systems, not 6v, and the dynostarters were rated by the need to start the engine, where maximum current can be very high, rather than the needs of charging. So a well maintained Schmitt can have its lights, sidelights and screen wiper on and maintain a charged battery. The margin of error is small, many Schmitter has had a glowing charging lamp winking at him, but these are microcars, and thats what that means. It is enough to get the job done. Its the deal. Its what one embraces as a microcar owner. If you do not like this then these are not the car for you. Add to this that in 1960 there were many cars still relying on semaphore indicators, vacuum wipers, and without heating to boot, and the package for the price was very good. For my own experience I never suffered a failure to get home for want of charging, save when I left for Kettering with a known defective dynostart and a promise of swapped batteries that was not fulfilled. I cannot say the same for Minis, Austin Healey Sprite and other, allegedly, better cars.
The specification works if it is maintained. What has happened is technology, legal requirements and driving habits have changed. The chief danger in driving some of the Microcars at night is that the small and closer coupled lights look like a car farther away than it really is to young numbty in his turbo terrific. He is therefore taken by surprise on suddenly finding a small car in front of him rather than a larger one, perhaps, in his mind, with a small trailer on some 50 yards further up the road. Such is the quality of driving now that this is a consistent dangerous situation as folk rely on the car to resolve the situation, rather than driving skill. I am not sure brighter lights resolves this issue of perceived size/distance away.
As to not driving your microcar at night. Ignoring the puddle jumpers, well that just means you really should not be owning one. Certainly spells death for any kind of meaningful pub night activity. You have to route find and learn to drive better to maximize the advantages of the Microcar. Sadly that is not a great help to the plain slow, but a Schmitt, or Goggo, is a perfectly legitimate car to drive at any time, if you understand it's, and your own, capabilities. Things like NSU and Bond Bug really should never be on trailers, at all. Now ask me about rally attendance and campers again? Its all tied together. If you do not use it, you will loose it.