I am an urban bike commuter that needs a reliable lighting system.
After a great deal of trial and error I mounted two of these units on my Trike.
NOTE IT IS NOT A BIKE AND HAS NONE OF THE NECESSARY CLOSE CLEARANCES TO SUPPORT THESE LIGHTS "out of the box"
So do not buy these if you have a trike or any other non traditional bike and want to just bolt them on and go.
But if you can look at your pedal powered vehicle as part of a universe of interchangeable parts you can make these units work
Here is how I have successfully mounted two complete sets of the 700 Series ReeLights (771 and 770) on my Terra Trike Tricycle.
Note again that these units designed to be mounted on traditional frame bicycles NOT TRIKES.
I ended up using all metal not plastic handlebar mounts for oversize handlebars on the oversize diameter lower rear frame stay and on the oversize diameter seat support stay so the two generating sets that I am using are on the same side of the bike in relation to the rear 26 inch wheel.
Then after adjusting the angles of the mounts inward toward the wheel to place the coils to close the three to four inch gap between the frame and the wheel that the Terra Trike frame geometry creates I was able to mount the generating coils that interact with the generating magnets right where they are supposed to be in relation to the magnets you attach to the wheels.
As if this was all on a traditional bicycle frame.
At that point I have two independent tail light + headlight systems on my trike and considering that I've been clocked at 22 MPH I now have sufficient headlight illumination for night riding.
But as it turns out both coils can share the same "ring" of magnets on the wheel. Think of it this way a magnet passes by one of the coils to generate power for one of the ReLight systems then moves on and a fraction of a wheel rotation later that same magnet NOW passes by the other coil to generate power for that other ReeLight system.
And on and on for each of the magnets in the circle.
If I have one complaint about these lights is that ALL OF the US sellers on Amazon AND ALL OF the sellers directly on the Web DO NOT stock any spare parts.
So after I broke one of the headlights (my fault in loading my trike onto the top of my car to carry it) I had to order a completely new set to use the headlight to replace the broken one.
So in the end I have a total of $300 or so into three sets for two working sets and the spare parts to keep them going on my trike.
Yes that might seem excessive but close to 5000 miles later they are still going strong.
And because I had extra magnets (total 9 on three sets) I could arrange almost all of them of them around my 32 spoke wheel to deal with balance noise issues and get bright lighting at all speeds.
About the spare parts issues I am writing to the European manufacturer to complain.
UPDATE
I bought one more set and put the tail light plus the coil on a MAYA Bike Trailer with a 16 Inch wheel.
AND IT WORKED !!!!
I only needed to use two magnets anti was GREAT;