Under what condition can an operator reduce the takeoff minima to 125m RVR for certain airplanes?

An operator can reduce the takeoff minima to 125 meters RVR for certain airplanes specifically when high intensity lights are spaced appropriately. This regulation is in place because high intensity runway lights enhance visibility on the runway, allowing pilots to have a clearer and more defined reference during low visibility conditions. The appropriate spacing of these lights ensures that they can effectively illuminate the runway, thus supporting a safer takeoff.

In aviation operations, maintaining safe departure under reduced visibility conditions is critical, and the use of high intensity lighting is a crucial factor that contributes to enhancing safety during takeoff. Without these types of lights or improper spacing, the ability to safely conduct a takeoff may be compromised, hence the regulation does not allow for a reduction in minima under those circumstances.