The faster you ride, the more light you’ll need
If you have a more aggressive riding style, travel frequently at high speeds or across extreme terrain, your front light requires as much power as possible to meet these demands. Light output is specified either in lux or lumens. Lumen is the international unit (SI) for luminous flux and indicates how much light a lamp emits at a given time. Lux is the SI unit for luminosity and indicates the amount of incident lighton a surface.
There’s just a simple rule of thumb in this case: more is more! Whether your light has values over 100 lux (e.g. Busch + Müller Ixon Space LED) or over 200 lumens (e.g. Lezyne Lite Drive Pro 115 LED), you’re already playing in the big leagues. Front lights such as the SL AF 7 LED by Lupine transform night into day, and can certainly hold their own against car headlights in terms of brightness. Be aware, however, that values are not directly comparable and cannot be easily converted between one another.
Tip: If you plan on mountain biking across technically demanding terrain in the dark, a powerful helmet lamp is the best option. Its light cone is directed exactly along your line of vision, whereas the light cone of a handlebar light corresponds to steering movements. Having only the latter option makes it difficult to see oncoming turns on winding trails, so we recommend a combination of both lights for optimum perspective.