... GLASS TUBE Supplying dark blue glass tube, UV glass tube DARK BLUE GLASS TUBE, Glass Tube, Glass Tubing, Fluorescent Tube, Flare Tube, Exhaust Tube, Lamp Tube FeatureAlso ... ApplicationUsed to make "Black light" or Ultraviolet lamp ("UV" lights) which is widely used in inspection of ... currency, ID & passport; criminal investigation. Also the UV lights are applied as decoration lights for DISCO, pub ...