Originally Posted by n4zou

LED light systems now rival older LED's and standard filament flashlight type bulbs.
The jump in light output is amazing as is the decrease in cost. Lumileds is on the forefront of developing extremely bright LED light assemblies and completers are getting the prices lower. Imagine having the equivalent light output of a standard 5-watt halogen light that takes only requires 25% of the current. You find your 2-hour battery pack now lasts 8 hours for the same amount of brightness.
The resulting jump in light output was due to a simple design change. These new LED's are mounted on a small circuit board about the size of a dime. This allows easy mounting to the required heat sink and allows much more current to flow through the LED resulting in a jump of brightness.
I foresee a new bicycle light system where this LED assembly and it's required heat sink is molded into a front bicycle reflector providing not only the required reflector but lighting for your after dark bicycle adventures as well. This would remove lights that mount to the handlebars and standard reflector mounts may be used keeping development and production costs low. Considering these LED lights last 100,000 hours it would make since to replace the entire LED/reflector assembly should the end user manage to actually use it 100,000 hours before something else destroyed it!