NASA Photo ID: KSC-72C-0150
Date Taken: 03/29/72
Searchlights illuminate the Apollo 16 Saturn V space vehicle during the ""wet"" or fueled portion of the Countdown Demonstration Test. The week long test was conducted to verify the vehicle and ground support equipment for launch day. Apollo 16 Saturn V at night on Pad 39A during countdown test
Source: http://images.ksc.nasa.gov