For quite a while (about 3 months or so) I've been having a problem where my non-rooted 2013 Nexus 7 would spontaneously reboot. Sometimes it would reboot twice a day, sometimes it would go 3 or 4 days without rebooting. It never took more than 4 days to reboot. To make a long story short, I eventually ended up uninstalling Lux, and now my current uptime is almost 20 days. It could be a complete coincidence, but it seems plausible that Lux was the culprit. Can you think of any reason Lux might cause a reboot?