If you are on a mission to save the earth by biking everywhere, then these are the must have accessories to top it all off. They do not need batteries to run, and in addition, they are extremely robust, so they will not quickly end up in a landfill somewhere.

Pluses: The above mentioned, plus there are modified versions for bikes with disc brakes. Also, alternate versions have one or more of the following features: blinking lights, continuous beams, capacitors that store energy while running so that lights continue to blink/beam for a short while after the bike stops. The lights are easy to install, are maintenance free and have zero operating costs! Fit and forget!

Minuses: These lights can only be mounted near the wheel axle because the lamp has to be near the magnets powering it. Hence the lights will be a little below knee level, which enhances bike visibility from a distance but may not be effective for cars right next to the bike. Also never forget that these are lights to be seen by, NOT to see by. I have installed an LED headlight in addition to these, to light the way ahead of me. As you may expect, the price is also higher than normal battery-powered lights, but very reasonable compared to dynamo lights. Part of the reason for the cost is also that the lights have to imported from teh Netherlands.

Keep your ride safe and green.