Reelight: Sustainable Bike Lighting for a Safer Ride

Reelight is a Danish company that specializes in creating innovative bike lights that operate without the need for batteries. Instead, they harness the kinetic energy produced by the spinning wheels of a bicycle to power the lights, making them a highly eco-friendly and sustainable option for cyclists.

In this blog post, I will take an in-depth look at Reelight and explore the benefits and drawbacks of using their products.

History of Reelight

Reelight was founded in 2003 by Kim Brodersen and Kenneth Gudmandsen, who wanted to create a bike light that did not rely on batteries. Their goal was to provide cyclists with a reliable and sustainable lighting solution that would also improve their visibility on the road.

Their first product was the SL100, which used a technology called "eddy current" to generate electricity. As the bike's wheels spun, a magnetic field was created, which in turn generated electricity to power the lights. The SL100 was a great success, and Reelight has since gone on to develop a range of products that use this same technology.

Today, Reelight is a leading brand in sustainable bike lighting, with their products available in over 20 countries worldwide.

Benefits of Reelight

The main benefit of Reelight is its sustainability. By harnessing the kinetic energy produced by the spinning wheels of a bicycle, Reelight eliminates the need for batteries, which can be harmful to the environment when not disposed of properly. This also means that there is no need to worry about charging the lights or replacing batteries, making Reelight a convenient and hassle-free option for cyclists.

In addition to being eco-friendly, Reelight also provides cyclists with an extra level of safety on the road. Because the lights are always on as long as the wheels are spinning, there is no need to worry about forgetting to turn them on. This means that cyclists are more visible to other road users, reducing the risk of accidents.

Another benefit of Reelight is that it is very low maintenance. Because the lights are powered by the bike's wheels, there are no wires or switches to worry about. This also means that the lights are very durable and can withstand harsh weather conditions.

Drawbacks of Reelight

One of the main drawbacks of Reelight is that it is not suitable for all types of bikes. Because the lights are powered by the wheels, they require a minimum speed to operate effectively. This means that they are not suitable for bikes with smaller wheels, such as children's bikes or folding bikes.

Another potential drawback of Reelight is that it can be less bright than battery-powered lights. This is because the lights are powered by the bike's wheels, which means that their brightness is limited by the speed of the bike. This may not be an issue for most cyclists, but those who ride in very dark areas may need to supplement their Reelight with additional lighting.

Finally, Reelight can be more expensive than battery-powered lights. This is because the technology used in Reelight is more advanced and requires more components. However, the long-term savings from not having to replace batteries can make up for the initial cost.


Overall, Reelight is a great option for cyclists who are looking for a sustainable and hassle-free lighting solution. While it may not be suitable for all types of bikes and may be less bright than battery-powered lights, its benefits in terms of sustainability and safety make it a great choice for most cyclists.

If you are interested in purchasing a Reelight, be sure to check out their website for more information on their products and where to buy them.

Here is my next post:   Why You Should Keep a Log of All Your Rides and What Information to Include


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