If you draw power from your shoks it also would mean higher power consumption. 12 mW
is nothing however, but less bounce in your shok springs because of a coil and magnet
generator, will translate into lost energy and higher roling resistance so this isn't
an untapped source of free energy either. What about a ultrabright LED iluminated
flashing sign with a solar cell back- or bottom plate, controlled by a charging
capacitor? I would be bright enough for most daylight conditions, would be relativly
cheap and a nice attention getter.