luminologistn.

/l(j)uːmɪˈnɒlədʒɪst/Etymology: < Latin lūmin-, lūmen light + -ologist comb. form.
1888 1 Mar. 411/1 Luminologists such as Giglioli, Dubois, and others.
1890 in (with quot. of sense 1).
This entry has not yet been fully updated (first published 1903; most recently modified version published online June 2021).