LEDs on Operator Console?

[WizenedEE]

We are using the Cypress IO board included in the 2010 KOP to connect physical switches to our driver station. We are using the enhanced IO, with the 3.3V setting.

We are wanted to add four LEDs to our operator console to assist the drivers. Has anybody has any success with this?

On the pinout diagrams for the Cypress, it indicates that most of the DIO pins can only source/sink 4/8 mA. That seems extremely low... and it seems that wouldn't power a standard LED. There are two "high current" pins that say they can do 20mA. Do we have to use those for the LEDs and only use two of them? Has anybody tried this with a sucessful outcome?

Also, with 3.3V, we can just use a resistor with about 200 ohms, correct?

Note that we got these LEDs from radio shack, and have literally no documentation (we got a variety pack, so even the size was listed as "varoius"). However, they seem like pretty standard 5mm LEDs.