How to read time in dark environment? Te answer from many people must be: Buying a luminescent wristwatch will solve this problem. The other question is that which luminous watch is better? Different luminous materials have different features and some even could expense your heath. You will find that the popular Rolex fake watches always offer ultimate legibility at night, so what material it adopts?

There are two types of fluorescent materials: light storage and self-lighting. Firstly, let’s talk about the former one. The light-storing fluorescent material can absorb the external light energy, so that the internal electrons become “active”. When the external light source disappears, the material will begin to slowly attenuation, the internal electrons gradually return to a “stable” state. During this time, the stored energy is released in the form of photons of a specific wavelength, that is, illuminating. The more commonly used light-storing fluorescent materials are zinc sulfide and barium aluminate, which vary in length from a few minutes to several hours depending on the quality.

The chromalight of Rolex applied this principle. The famous blue light of Rolex Sea-Dweller copy watch with Oystersteel bracelet relies on the principle of light-storing fluorescent material. The obvious disadvantage of this material is that the lighting couldn’t last long time. As the material ages, its brightness will be further attenuated in time. Even a good brand like Rolex can only improve but cannot completely avoid this problem.