lūcū^bro, āvi, ātum, 1, v. n. and a. [lux], to work by lamp-light, work at night. Neutr.: (Lucretiam) deditam lanae inter lucubrantes ancillas inveniunt, Liv. 1, 57, 9: sin lucubrandum est, non post cibum id facere, sed post concoctionem, Cels. 1, 2; Plin. Ep. 3, 5, 8.

— Act., to make by lamp-light, to compose at night: parvum opusculum lucubratum his jam contractioribus noctibus, Cic. Par. prooem. § 5: nox lucubrata, spent in work, Mart. 4, 90, 9: viam, to travel by night, App. M. 6, p. 186.