The brightness and duration of lume depend on several factors, including the type of luminous material used, the amount applied, and the level of exposure to light before entering a dark environment.

Maximum brightness is typically achieved after exposure to direct sunlight or strong UV-rich light sources.

Different models may use different lume formulations depending on their design objectives. While some models use high-performance luminous compounds optimized for maximum nighttime visibility, others may use darker lume formulations selected primarily for aesthetic reasons.

Dark-colored lume compounds naturally produce a less intense glow than traditional light-colored formulations such as BGW9. This is a normal characteristic of the material and should not be considered a defect.

Variations in lume intensity between models, components, and designs are therefore expected and form part of the intended character of each watch.