LED Brake light clusters - DIY

[alexanderfitu]

Thanks for the help with the calculations.

my diode is dropping close to 0.7 volts and the wiring a bit more than a volt, so I went with 5 leds per string with 15 ohm resistors, this has helped make the tail lights brighter when on at night (previously pretty badly dim), i stuck with the same 20ohm 0.5w resistor I had in place and its working much better.

Thanks