Having had a 50’s era advertising searchlight, I couldn’t resist picking up this original 1927 photo of a 4 Billion Candle Power advertising light. Look close to see the man standing at the base. The long extension was for a plate of text that was projected onto sides of buildings producing 150’ letters. By comparison, my 60” 1942A WWII Carbon Arc produced only 800,000,000 CP. This monster produced 4,000,000,000 CP!