What is the correct method to activate airport lights at night?

The correct method to activate airport lights at night is to click the microphone three times for low intensity. This standard procedure is utilized at many airports to enable pilots to turn on the runway and approach lights without contacting ground control.

The three clicks signal low intensity lighting, which is generally used for enhancing visibility during night operations. This is particularly important for ensuring safety during takeoffs and landings in limited visibility conditions.

The other methods proposed in the options indicate different numbers of clicks for activation of other light intensities that may not align with the standardized operating procedure used at most airports. Knowing the correct activation method is vital for pilots to prepare for safe ground operations during nighttime.