I have the RidEye front and back. My avatar is from a screen capture taken just yesterday with the RidEye (full disclosure: slightly downhill, max effort, my biggest gear of 50x12 to hit 34mph - it still brought a smile to my face).

No experience with the RidEye at night, sorry. I still have yesterday's video. Let me see if I can grab some license plate shots both in the sun and shade - that might give you some indication.