Luciferous (loo-si-fer-us) adjective: illuminating, literally and figuratively.
Admit it, you thought it meant Satanic or evil, didn't you? That's because Lucifer was the Devil's name before he was cast out from Heaven. Lucifer, from the Latin words lucerne and ferre, meant "light-bearer."
So if someone describes you as luciferous, it's really quite the compliment.