Leds using a old servo board question

[Cossett]

Im planing on making my own roof clearance lights and using a old servo board to turn then on / off and my question is -
When wiring up the leds as I plan on having then on there own wired to male plugs and then soldering the female wires into 1 pos and 1 neg lead so each led can be removed seperately, do I still need a resistor for each led as Im keeping the potentiometer attached to the servo board ?
The led will be either white or orange but havent decided on the color yet and what is the max number or leds you can run from a servo control board ?

Cheers Tracy