Collection: HUV - High UV Visibility

HUV - HUV identifies a Foo Fliers DGO dyed disc as having High UV Visibility [HUV] or fluorescence when exposed to ultraviolet light. 

Ultraviolet [UV] light spans wavelengths of 100–400nm. In general, longer wavelengths (395 nm and higher) tend to produce some visible light, reducing the strength of fluorescence. A 365nm wavelength UV light would be better for purposes of activating fluorescence even in daytime.