Lewis Short
(verb) : lūcūbro, āvi, ātum, 1, 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.
Charlton T. Lewis, Charles Short, A Latin Dictionary