I didn't think to take a photo at the time, but yesterday afternoon, I went to check the time on my Lily and I don't know if the 'wake' action got stuck or something, but the screen was so faded/light that I could barely read it (I was indoors, good lighting, should've been crystal clear). Let it go back to sleep and redid the wake movement and it was fine. I haven't seen it happen since, but I've only had my Lily about 3 weeks no, so not sure if this is a one-time glitch or a known issue.
If it happens again, I'll post an update here