Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
lūmĭno, āvi, ātum, 1, v. a. [lumen], to light up, brighten, illumine (post-class.): tu luminas solem, regis mundum, App. M. 11, p. 269, 40: tellus floribus luminata, Marc. Cap. 1, § 27; § 66: locus fenestris luminatus, Cael. Aur. Acut. 1, 9.
Hence, lūmĭ-nātus, a, um, P a.: male luminatus, short-sighted, App. M. 9, p. 222, 32.