My motorcycle has a Givi model E52 trunk that has integral brake lights to augment the bike's existing brake lights. The E52 uses 12 incandescent bulbs that take quite a bit of power (on the order of 10 to 15 Amps). By replacing these incandescent bulbs with LEDs I was able to reduce the current requirement to about 50 mA. There is much less heat generated which is better for the plastic case and the LEDs will have a very long lifetime when compared to the life of incandescent bulbs.
1) A philips screwdriver 2) A soldering iron and solder 3) An Xacto hobby knife (for cutting circuit board traces) 4) 12 x Red LED -- high-brightness (e.g. Digikey Part # 160-1620-ND) 5) 2 x 50 Ohm resistors 6) A motorcycle or scooter with Givi E52 installed (not shown here ;-)
Optional but very handy to have:
7) circuit board vice (a third hand) 8) digital multimeter (DMM) useful if debugging is needed