Lewis & Short

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lūcĕo, xi, 2, v. n. [Sanscr. ruk, to be bright; Gr. λύχνος, λευκός, ἀμφιλύκη; Lat. lux, lumen, lucidus, luna; O. H.-Germ. liŏht; Germ. Licht; cf. also illustris], to be light or clear, to shine, beam, glitter (syn.: splendeo, fulgeo).

  1. I. Lit.: (lumen) Nihilo minus ipsi lucet, Enn. ap. Cic. Off. 1, 16, 51 (Trag. v. 389 Vahl.): tum candida lumina lucent, id. ap. Fest. p. 228 and 229 Müll. (Ann. v. 157 Vahl.): (stella) luce lucebat aliena, Cic. Rep. 4, 16, 16: dum meus assiduo luceat igne focus, Tib. 1, 1, 6: lucet igne rogus, Ov. H. 11, 104: rara per occultos lucebat semita calles, Verg. A. 9, 383: lucet via longo Ordine flammarum, id. ib. 11, 143; cf. Prop. 2, 14 (3, 6), 17: interior caeli qua semita lucet, Stat. Th. 9, 641: (luminaria) lucent in firmamento caeli, Vulg. Gen. 1, 15: niveo lucet in ore rubor, Ov. Am. 3, 3, 6: lucent oculi, id. M. 1, 239; Val. Fl. 6, 492: cinis in multam noctem pertinaciter luxit, Suet. Tib. 74: virgatis lucent sagulis (sc. Galli), glitter, Verg. A. 8, 660: taedā lucebis in illa, i. e. shall burn, Juv. 1, 155: non amplius erit sol ad lucendum, Vulg. Isa. 60, 19.
    In the part. pres.: e rosea sol alte lampade lucens, Lucr. 5, 610; so, globus lunae, Verg. A. 6, 725: faces, Ov. F. 3, 270: sedebat In solio Phoebus claris lucente smaragdis, id. M. 2, 24: lucerna lucens in caliginoso loco, Vulg. 2 Pet. 1, 19.
    Poet., with acc.: huic lucebis novae nuptae facem, will light her home with a torch, Plaut. Cas. 1, 30: tute tibi puer es; lautus luces cereum, id. Curc. 1, 1, 9.
      1. 2. Of the day, daylight, etc., to appear, dawn, become light: an umquam lucebit in orbe ille dies, Sil. 16, 91: lucente jam die, Amm. 21, 15, 2.
          1. (β) Esp., impers.: lucet, lucebat, etc., it is (was) light, it is (was) day, it is dawning: priusquam lucet, adsunt, Plaut. Mil. 3, 1, 115: si lucet lucet: lucet autem, lucet igitur, Cic. Ac. 2, 30, 96: si judicatum erit meridie non lucere, id. Att. 1, 1, 1: nondum lucebat, id. Rosc. Am. 34, 97: nec satis lucebat: cum autem luceret, etc., id. Att. 16, 13, a, 1: ubi lucere coepisset, id. Div. 1, 23, 47: expergiscere: lucet hoc, it is light, it is day there (in the sky), Plaut. Mil. 2, 2, 63: hoc … luce lucebit, id. Curc. 1, 3, 26.
    1. B. Transf., to shine or show through, to be discernible, visible (poet.): si qua Arabio lucet bombyce puella, Prop. 2, 2, 25 (2, 3, 15): femineum lucet sic per bombycina corpus, Mart. 8, 68, 7: vitalia lucent, are uncovered, Stat. Th. 8, 525.
  2. II. Trop., to shine forth, to be conspicuous, apparent, clear, evident: nunc imperii nostri splendor illis gentibus lucet, Cic. Imp. Pomp. 14, 41: mea officia et studia, quae parum antea luxerunt, id. Att. 3, 15, 4: cum res ipsa tot, tam claris argumentis luceat, id. Mil. 23, 61: virtus lucet in tenebris, id. Sest. 28, 60: tota oratio lucet, Quint. 8, 5, 29; 9, 1, 19.
    Hence, lūcens, entis, P. a., shining, bright, conspicuous: lucentior usus, Mall. Theod. de Metr. 9, 7.

lux, lūcis (adverb. abl. luce, luci, and lucu, and in these old forms also used as m.; v. infra; in Plaut. lux is usually m.; Brix ad Plaut. Capt. 5, 4, 11), f. [luceo], light.

  1. I. Lit.
      1. 1. In gen., the light of the sun and other heavenly bodies: cum id solis luce videatur clarius, Cic. Div. 1, 3, 6; id. Tusc. 1, 37, 90; id. Cat. 1, 3; id. Cael. 9: per umbras Stella facem ducens multā cum luce cucurrit, Verg. A. 2, 694: a lucifero donec lux occidat, till sunset, Juv, 13, 158.
        The light, splendor, brightness of shining bodies: viridi cum luce zmaragdi, Lucr. 4, 1126: luce coruscus ahenā, Verg. A. 2, 470: lucem non fundentes gemmae, Plin. 37, 7, 25, § 94: ferri, Stat. Th. 8, 124.
      2. 2. In partic., the light of day, daylight, day: diurna, Lucr. 6, 848: Metellus cum primā luce in campum currebat, Cic. Att. 4, 3, 4: ante lucem, id. de Or. 2, 64, 259: primā luce ad eum accurrit, at daybreak, dawn of day, Caes. B. G. 1, 22: luce sub ipsā, on the very verge of day, Verg. G. 4, 490: in luci, by day, Lucr. 4, 233: luce reversā, Juv. 6, 312.
        Hence,
        1. b. In abl. adverb.: luce, luci, and (ante-class.) lucu, by daylight, in the daytime: ut luce palam in foro saltet, Cic. Off. 3, 24, 93; so, luce, id. Pis. 10, 23; Auct. Her. 4, 36, 48; Verg. A. 9, 153 al.: nocte ac luce, Juv. 15, 43: ut veniamus luci, Plaut. Cas. 4, 2, 7: cum luci simul, id. Merc. 2, 1, 31: luci claro, id. Aul. 4, 10, 18; cf. Non. 210, 9: quis audeat luci, Cic. Phil. 12, 10, 25: quodsi luce quoque canes latrent, id. Rosc. Am. 20, 56; Liv. 35, 4, 5: cum primo lucu ibo hinc, Ter. Ad. 5, 3, 55: cum primo luci, Plaut. Cist. 2, 1, 49.
    1. B. Transf.
      1. 1. The heavenly bodies: illae, quae fulgent luces, Cic. Arat. 96.
      2. 2. A day: centesima lux est ab interitu P. Clodii, Cic. Mil. 35, 98: longiore luce ad id certamen nobis opus est, Liv. 3, 2: anxia nocte, anxia luce gemit, Ov. M. 2, 806: crastina, Verg. A. 10, 244: natali die mihi dulcior haec lux, Juv. 12, 1: septima quaeque lux, id. 14, 105; cf.: natura volvente vices et lucis et anni, id. 13, 88.
        Hence, poet.: lux aestiva, summer, Verg. G. 4, 52: lux brumalis, winter, Ov. Tr. 1, 11, 39.
      3. 3. Life: qui ab Orco mortuom me reducem in lucem feceris, Ter. Hec. 5, 4, 12: corpora luce carentum, i. e. of the dead, Verg. G. 4, 255; Sil. 13, 473; cf.: simul atque editi in lucem sumus, Cic. Tusc. 3, 1, 2.
      4. 4. An eye, the eyesight: effossae squalent vestigia lucis, Stat. Th. 11, 585: damnum lucis ademptae, Ov. M. 14, 197.
      5. 5. A light, of an eminent man to whom all eyes turn: Luce nihil gestum, nihil est Diomede remoto, Ov. M. 13, 100.
        Of a beloved person: o lux salve candida, Plaut. Mil. 4, 8, 34.
  2. II. Trop.
    1. A. The sight of all men, the public view, the public, the world: nec vero ille in luce modo, atque in oculis civium magnus sed intus domique praestantior, Cic. Sen. 4, 12: Isocrates forensi luce caruit, id. Brut. 8, 32: familiam abjectam et obscu ram e tenebris in lucem vocare, id. Deiot. 11, 30: res occultas aperire in lucemque proferre, id. Ac. 2, 19, 62.
    2. B. Light, encouragement, help, succor: lux quaedam videbatur oblata, non modo regno, sed etiam regni timore sublato, Cic. Phil. 1, 2, 40: civibus lucem ingenii et consilii porrigere, id. de Or. 1, 40, 184; cf.: lucem adferre rei publicae, id. Manil. 12, 33.
    3. C. A light, an ornament: hanc urbem, lucem orbis terrarum, Cic. Cat. 4, 6, 11: genus sine luce, undistinguished, obscure, Sil. 8, 248.
    4. D. Light, illustration, elucidation: historia testis temporum, lux veritatis, Cic. de Or. 2, 9, 36.
    5. E. That which enlightens, the source of illumination: ratio quasi quaedam lux lumenque vitae. Cic. Ac. 2, 8, 26; cf.: ego sum lux mundi, Vulg. John, 8, 12; id. ib. 12, 26.