Dale is a member here. His screen name is DBCstm. He comes up with some outrageous flashlights sometimes! For instance, he owns a 3” long flashlight that he calls the Texas Poker. It is capable of around 1000 lumens from a single 10440 cell! He has made flashlights that you could carry in your pocket that are capable of producing over 5000 lumens. The flashlight I mentioned above that does 20,000 lumens is a BTU Shocker that he modified and put 3X XHP-70 in it. He said it only made 20,000 lumens briefly. Another member, Old-Lumens is building a new handmade light that will produce over 20,000 lumens when it is finished. It uses a single Cree CXA3590 emitter and 9X 18650 cells! He has already tested the emitter at 45 volts and 4.25 amps! Here is the link to that one.