In watch design, luminous indices have evolved from simple painted markers to sophisticated light-emitting elements. The latest innovation comes in the form of three-dimensional lume blocks, which depart radically from conventional flat applications by incorporating raised, geometric structures. Unlike traditional indices that rely on surface-level lume coatings, these 3D blocks utilize their physical depth to dramatically improve light absorption and emission.

What Are 3D Lumed Blocks?

3D lume blocks are solid, raised markers applied onto the dial, typically filled with a luminous compound such as Japanese C3/BGW9 Super-LumiNova. Unlike standard flat lume, which sits flush with the dial surface, these blocks have height and structure. They offer a more tactile appearance and increase surface exposure to light, which can enhance brightness and longevity.

Practical Benefits

One of the key advantages of 3D lume blocks is improved legibility. Their raised profile makes the indices easier to distinguish at a glance, especially in low-light conditions. With more surface area and volume compared to flat lume, they absorb and emit light more efficiently after being charged by natural or artificial sources. Beyond functionality, these blocks also add a sense of depth to the dial, creating dimensionality without relying on overly complex design elements.

This approach is well-suited to watches that emphasize clarity and practicality — such as Revelot’s Terra and LIMA Flieger collections. In the Terra series, the 3D lume blocks complement the field-ready design while enhancing visibility at night. In the LIMA Flieger, which features a turbine-style dial, the blocks reflect the structured and readable layout of cockpit instruments, underscoring the watch’s aviation influence.

Compared to Traditional Lume (Lume-Plated)

Traditional lume is widely used and effective for most applications, especially when applied generously with quality materials. However, it typically lies flat on the dial and may lack depth, making it less noticeable in both appearance and brightness. In contrast, models like the Hexmariner and Gentus use lume-plated indices, where luminous material is applied onto polished metal markers. This technique provides a sleek, refined look and reflects light well in daylight, but doesn’t deliver the same level of structure or lume mass as raised 3D blocks.

A Matter of Preference

Choosing between 3D lume blocks and traditional lume largely comes down to personal preference. Some may appreciate the cleaner, more understated look of flat lume, while others prefer the added presence and performance of raised blocks. Either way, both methods aim to improve visibility in the dark — just through slightly different means.