... lamp, electric lighting in the top with beads. UV Detector:Detector portable hand-held lights here, put 4W UV lamp, ... 5,1 fluorescence, there is a negative reflection of fluorescence; counterfeit money no fluorescence. 2, true absorption of paper currency, ... no reflected light; counterfeit Qingbaikouan paper has a strong reflected light. 3, counterfeit money or logo watermark exposure ...