Quoted from LOTR_breath:

Here is a link to a thread on Pinballbash from 2 years ago.
http://pinballbash.com/forum/index.php?topic=13101.60
Look at page 5 to see my details of how I wired up the light cycles. This was before I did the Recognizer and the Quorra car. I would recommend the PIG if you are not good with a meter and soldering in tight spaces! I did a fairly poor job at mounting the Quorra car. I will see if I can get a few better pics up. For LED's I used some green LED's I bought at RadioShack. I'll see if I still have the package to get a part number. I just bent the legs on the LEDs to simulate a person sitting in the car, used a hot glue gun to fix them in the car, and ran wires to the legs of the LED's from underneath the car.
Also in that thread is a link to a video that Bryan did showing how the light cycles and recognizer are interactive with the modes. So much better than just tied into the GI.