So your team wants to use LED lights on the robot? That is such a sweet idea and it is completely possible and reasonable! The LED lights will give your robot an extra "pop" and definition when it is out on the field; not to mention every eye will be drawn to your robot.
If you are looking for lights that are easy to install I would recommend these specific lights here: www.adafruit.com
These LED lights have arduino code, so you can interface it to the cRio through a pair of digital outputs. You can take the Arduino library and adapt it to use the SPI.h interface in Wpilib, this way the lights respond to a lot more of the robot, driver actions, and the wiring will be much simpler. Make sure you use the individually addressable LED's from Adafruit and hook it up to a couple DIO ports, this then can call them directly from the cRIO using SPI in Java.
These are very high powered flexible trips that have worked well for a lot of FRC teams. All you need to do is connect it to the solenoid breakout. Make sure you get one NFLS10-2CPTH solderless pigtail adapter per section.
Hope this helps! Comment if you know of any other places to get great LED lights for the robot!