Lux | Webster's Dictionary of the English Language

lux
lux, lūcis (adverb. abl. luce, luci, and lucu, and in these old forms also used as m.; v. infra; in ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
lux
lūx lūcis, f LVC-, light, brightness : solis ac lychnorum: Stella facem ducens multā cum luce, V.:...

An Elementary Latin Dictionary