The shorter the wavelength of the UV flashlight, the darker the light would be. For example, UV wavelength of 395nm is brighter than 365nm. Below are the pictures taken by the two flashlights, the difference between 395nm and 365nm torch light can easily be seen.

Picture above is the UV 365nm flashlight shining to the ￥5，which shows golden yellow, reflector of the florescence parts is clear, the other parts can hardly see the UV.

These are the application picture of wavelength of 395nm, florescence can easily be seen, but it can’t show the reflector at the small parts of the back.

See from the application pictures, different wavelengths have different display results. 365nm shows the best, 385nm is the second, 395nm is the last.

Pictures above are the two flashlights shine to different napkin, one with fluorescent brightener, the other doesn’t.

We can easily figure out that the fluorescent brightener shows especially obvious under the shining of 365nm, it almost shows nothing with the one without fluorescent brightener. The object will show purple light under the shining of other wavelengths, they can only be figured out whether they have fluorescent brightener through the comparison.

Below are the application pictures of shining to ￥50.

The application pictures of two different wavelengths shining to ￥50.

You can easily distinguish the 365nm from other common wavelengths by the application pictures above. Take RMB for example, the biggest difference is 365nm can show the back side of the RMB, with good fluorescent ink pattern, meanwhile, we can hardly see or even can’t see by the common wavelength.

These are the application pictures of two different wavelengths shining to the money.