I can hear them now "run for the hills!"
but with proper care you can use NV for some solar uses
Note: I only use my older gen2 low performance tubes
you must remember not to turn on device until seated with proper filters
Note even though QE is very low at these freq(UV) the signal is strong (think 1% of 100 million dollars is still a lot of money)
in this case i use it to pick off proper element in UV part of spectrum in my SHG(spectroheliograph)
normally invisible to most humans especially the old ones
here is setp