I've been using a Joystick for road riding and frankly I'm getting a lot of flashing from oncoming traffic because half my lumens are ending up going anywhere but the road. This annoys drivers because they're getting dazzled and it annoys me because half the contents of my battery are being jizzed away without doing anything remotely useful.
Is there anything out there that has a proper directional beam, ie not scattering half the light uselessly into the trees and into the eyes of oncoming drivers? (And which is bright enough to chop along at a decent pace and can, like the Joystick, be configured to keep running all through the night?)
Or has anyone ever tried making a hood? Or cutting a semicircle out of a headlight "beam bender" and sticking that on the front of a bike light?
Anything less bright (ie most road-specific lights) is not an option because it'll mean having to ride too slowly.
Any of the light builders out there thinking of building something like this if it doesn't exist? As a design reference, if the Joystick put all its output in the lower half of its beam circle, and stretched that circle a little wider, then it'd be about perfect: small enough not to get in the way, just bright enough (with the extra light being sent downwards), and with the option of 12 hours' burn time with the external battery.
From what I can see, everyone mostly seems very keen to build lights that are powerful enough to melt trees at 100 yards for an hour and a half, but I don't see anyone building a light which actually uses its power cleverly on the road.
Though I'd be very happy to be proved wrong 
