Thank you very much. I was wondering if i could use 1 resistor in series but thought i didn't know the forward voltage and forward current for the LED to make the calculation. R=(vs - vf) / lf. Thanks for letting me know that the voltage required to operate the light is the forward voltage (vf) and the current drawn by the light is the forward current. (lf). After drawing the circuit everything you said become clear.
I will experiment with 27 volts as Vs because when those batteries are charged the voltage is around 27.0v. In that case R should be 1263, i think the closest value is still 1.2k. Real componet will need adjustment anyway...