Aint I the lucky one I have two but not with roman numerals.
One I bought from LIDLs and another made by oregon scientific.
Anyway why would you want roman numerals projected onto your ceiling or walls...the idea is, that through the night or dark mornings you can open one eye and see the time without really moving too much or having to use your brain, converting back to conventional time, which is what you want to know in the first place.
I dont mean to sound flippant in my answer. Honest!