Printing neon or ultraviolet colours is, unfortunately, not possible with the colour profile we use.
The colour profile we use is CMYK. This is the most commonly used profile for printing purposes. Anything that falls outside the range of CMYK, will automatically be converted into colour within the CMYK range. This means specific colours, such as neon or ultraviolet colours, including northern lights, some underwater photography and black lights, will be printed differently than what you see on your screen.
For more information about the CMYK colour profile, read What colour profile do you use (CMYK or sRGB)?
Regrettably, we are not able to print these photos with a different colour profile.