It is great to have a brake LED instead of using a reflecting one for your bicycle.The reflecting one works only at night and it cannot glow when you are using your brake, so its good to fix led in it.This instructable shows how to fix led in the rear reflector.It is easy and it takes only ten steps to complete.The only thing is you have spend some time to save your life.
Thin strip of conductor
Step 1: Drilling holes for led
Mark according to the size of led and number of bulbs and start to drill on the back of the relector. Make sure that the edge of the led suits correctly into the hole.I have used 6 led to get bright light.