Interesting. Yet another example where medical equipment has been slow to adopt technology that has been around in other areas for quite a while!

Have you tried other (
cheaper) light meters, compared readings with the "official tester", and applied a "fiddle factor"?
I haven't checked the relative fluorescent
versus LED wavelengths. Why not? ... too busy ... I'll give someone else their chance (but
this guy could tell us), but it could be a 1:1 relationship (or near enough) for all I know.
Meanwhile, there are some nice ones
here.