The new fuss today is all about these expensive UV flashlights costing around 30$ to 100$, even the 5mm UV LED discretes are still expensive which cost around 300-600 pesos here in the Philippines. The common application of this gadget is to act as an excitation source for fluorescent or luminous materials. UV flashlights are used in currency validation to identify genuine or counterfeit paper money, mineral and substance identification, excitation source for glow-in-the-dark objects, forensic investigation and fluid leak detection. Extra care must be taken when using LED flashlights because UV is harmful to the human eye.