Luminova and (Swiss) Super-LumiNova are not prone to discoloration or ageing over time. They don't fade, nor will interact with moisture. White will be white forever.

How long will Super-LumiNova last?

Super-LumiNova lasts the entire lifetime of your watch. It doesn't fade, decay, or age. Luckily for watch enthusiasts, the Japanese enterprise, Nemoto & Co. introduced a LumiNova pigment in the early 1990s.

How long does Super-LumiNova last in a Rolex?

These have a half life of about 12 years, which effectively means they'll eventually stop glowing and will at varying rates, develop a patina. The "T" on the dial at where the 'Swiss Made' is will indicate this for most watches.