When is it permitted to use the high beam of a vehicle during "lighting-up time"?

The correct answer: On a non-urban road, when traffic conditions permit it and there is no oncoming vehicle.

During lighting-up time, the high beam may be used only on a non-urban road, when traffic conditions permit it and there is no oncoming vehicle. High beam dazzles other drivers, so it is not for urban roads, even with street lighting, and driving in a convoy is not an exception.