You are driving in an emergency situation at night on a conventional road that is insufficiently lit, at a speed below 40 km/h, using the low-beam (dipped) headlights. Is this correct?

When driving on an interurban road that is insufficiently lit, we should drive with high-beam or main headlights, except when we may dazzle others or when driving at a speed not exceeding 40 km/h, in which cases I may optionally use the high-beam or low-beam lights.
Therefore, in the case of the question, it is correct to drive with the low-beam light even if the road is insufficiently lit, since the speed at which we are travelling will allow us to stop the vehicle within the lit area.