... Europe, America, Asia Portable skin diagnosis system,ultraviolet analyzer,uv analyzer It is a unique machine ... , but emits the safer version of Ultraviolet rays (UVA) after harmful Ultraviolet rays (UVB and UBC) are filtered out ... tube, they emit white light and also some ultraviolet light. In a black-light bulb, the ... (fluoresce) differently to these safer type UV rays. Even though UV-A is widely used, ...