The MJ-880 front light is nice for trail rides but not recommended on open roads as there is no light beam cut-off, which might blind the upcoming traffic. I prefer the battery powered Philips SafeRide 80 which appears to be the best homologated LED front light. It is lighter (320 gr) and although its light output is lower than the Magicshine (220 lumen vs. 2000 lumen) , it is more efficient by not illuminating the trees but only the road.
The following website shows extensive front light test results: http://swhs.home.xs4all.nl/fiets/tests/verlichting/index_en.html