Tex Helm's Carlsbad Cavern Big Room shot used 2400 #2's for 55 million sq. ft. So Meggaflash 300's likely four for 55,000 sq ft. They will fire from 6 volts. 110,000 average lumens. About 6 million peak. If he sets off enough bulbs the ground may glow. Can you tell I love his opportunity. I still remember my last shot with a #2. Caused a helicopter search for the reported plane crash. Everyone saw the huge flash in the middle of the golf course.