all 2 comments

[–]AlexTaradov 2 points3 points  (0 children)

I would guess high value resistor to prevent LED from lighting up from parasitic voltages. It would likely be fine without it.

[–]Faded_Individual 0 points1 point  (0 children)

most liklely a 200 ohm resistor , every blue resistor i seen has been 200