Lucem Ferre is TO BRING LIGHT, or to carry/bear light
LUCIFER is the light bearer - that was Satan's original role, but helas he botched it all and was thrown into the abyss - but the name did not change.....
Deus Non Est well, if you mean. The grammar is sound, anyway.
As for the spelling: Romans used, not surprisingly, the Latin alphabet - but they
1. only wrote in CAPITAL LETTERS
2. They had no u / U, but only V
DEVS NON EST