Lume is a short term for the luminous phosphorescent glowing solution applied on watch dials. Through the year Rolex has used different materials to achieve this.
| Material | Period | Dial |
| Radium | early 1960s | SWISS |
| Tritium | 1998 | T Swiss T or T Swiss T<25 |
| Luminova | 1998 – 2000 | SWISS |
| Super Luminova | 2000 – 2008 | Swiss Made |
| Chromalight | 2008 – now | Swiss Made |