Have you compared the Hopoocolor to the UV and fluorescent spectra? If so, how well did it match up? Was it off near the 350 end?Have you shared your results?
The Hopoocolor will read down to 350nm, but it is more expensive; however, given availability, the Spectryx option would be a good thing for the hobby. Besides GHL and Kessil, most LED lights don't have UV diodes, so looking below 400nm isn't needed.