no rgb selection in resistor calculator

[reno]

i have an rgb led that i got from ultra and i didnt find a selection for this while trying to find out what resistor i needed for it with a 4.5v power supply... a little more knowledge, might light my way... and my saber.:D

[hebert466]

from what I have seen you will have to treat each LED in the rgb as seperate LEDs or use a driver that is designed for it...(and I am sure if I am wrong then someone else will say so).

[Azmaria Dei]

yeah there's no chart for that here since Tim doesn't sell them. you'll need to find the original specs and calculate each die of the RGB individually.