The Turn Of The Century Electrotherapy Museum http://www.electrotherapymuseum.com Carbon Arc Lamps Lamps are blinding at full power Appearance of carbons after arc is extinguished. Therapeutic Carbons and Sunshine Carbons Spectrum Analysis of Arc Carbons For reference, an angstrom is .1 nanometers, so 4300 AU = 430 nm Homemade Arc Lamp I made Early Carbon Arc Lamp made by my Dad Magic Lantern Arc Lamp Ad for Arc Lights Mercury Vapour Arc Air-Cooled Tungsten Metallic Arc