Lumens or Lux? Wide beam or focused? Don’t leave your nighttime safety to chance. Discover our complete guide to finally understand the technical specifications of your lamps and find the ideal brightness for your trips, whether you’re riding under city streetlights or in the total darkness of the countryside.

Lumens, Lux, and Beams: The Ultimate Guide to Choosing Your Bike Lighting

Whether you're a fan of urban "bike commuting" or passionate about night rides in the forest, seeing well and being seen is not just a matter of comfort, it’s a safety priority. Yet, it’s easy to get lost when faced with technical specifications.

Lumens, Lux, wide or narrow beams… We explain everything to help you make the right choice.

1. Lumens vs Lux: What’s the Difference?

This is the most common mistake. To choose well, you need to understand these two units:

• Lumen (lm): This is the total amount of light emitted by the lamp in all directions. The more lumens, the "stronger" the lamp.

• Lux (lx): This is the light intensity received on a given surface (the road).

The image to remember: Imagine a jet of water. The Lumens represent the flow of water coming out of the hose. The Lux represent the force with which the water hits the wall. For a cyclist, Lux is often more indicative of the quality of vision on the road surface.

2. Which Beam for Which Use?

Power isn’t everything; how the light is projected is crucial:

• Wide beam (Flood): It lights diffusely. Ideal for being seen from the side and for spotting obstacles at the edges of the road (animals, ditches).

• Narrow beam (Spot): It concentrates light far ahead of you. Essential for riding fast, to anticipate potholes or turns.

3. What Power to Choose Based on Your Route?

In a Lit City (Urban Bike Commuting)

Here, the main goal is to be seen by drivers. Public lighting already does the job for you.

• Recommended power: 50 to 200 Lumens.

• A little extra: Choose a "flash" or "pulsed" mode during the day to attract attention without dazzling.

On Country Roads or Unlit Bike Paths

Here, you need to see the road surface.

• Recommended power: 400 to 800 Lumens.

• Advice: A mixed beam (wide near the bike and focused far ahead) is the best compromise.

In the Forest or Off-Road (Night Mountain Biking and Gravel)

In complete darkness, terrain features and branches require maximum power.

• Recommended power: 1000 Lumens and above.

• Expert tip: Ideally, combine a powerful handlebar light with a headlamp on your helmet to illuminate where you look in turns.

4. The Criteria That Make a Difference

Before confirming your purchase, check these three points:

1. Battery life: A 1000-lumen lamp is powerful, but how long does it last at full power? Check for energy-saving modes.

2. Water resistance: Look for the IPX4 rating (splash resistant) or IPX6 (resistant to heavy rain).

3. Charging: The USB-C port has become the standard for easily recharging your lamp at the office or on an external battery.

Conclusion

Choosing your lighting means finding the balance between the necessary power and the desired battery life. For versatile use, a lamp with 600 to 800 Lumens and multiple adjustment modes remains the best investment.

Discover our selection of high-performance lights (Rockbros, West Biking) in our store and ride with peace of mind, day or night!

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