... ac voltage, it provide the whole constant working power for ultraviolet light, produce 315-400m wavelength black light, so as to ... . Weight: 5Kg3. Dimension: 255(width)×105(high)×165(Length) 4.Ultraviolet spectrum : 315-400nmMethod of use:1. Power cable and lamp ... power supply voltage has 220V voltage indicator, after all the ultraviolet lamp completely bright, you can detect fluorescent powder flaw.4 ...