The problem with affixing a MagLite to your handlebars is that it is either going to penetrate you in a collision, or become a projectile in a collision. Neither is attractive option, IMHO.
And then there's the batteries for traditional flashlights - use 'em up, and how to properly dispose of them?
I just elsewhere compared the new $100 NiteRider USB model versus a "D" Cell MagLite. For the same anticipated 750 3-hour cycles of the NiteRider's battery pack, it would cost over $500 for a MagLite with LED Upgrade - and the scores of batteries needed.
A very personal decision: an expenditure of $100 ... or over $500?
Seriously, though - you need to examine how often you need illumination. And whether or not you need the road illuminated, or if you know the route, and don;t quite need all the power to see the road - just adequately announce yourself to the world.
Clint Bradford
http://www.clintbradford.com