Lux - 3rd Party App Brightness Control

Anyone use Lux?

Free
https://play.google.com/store/apps/details?id=com.vito.lux.free&hl=en

Paid
https://play.google.com/store/apps/details?id=com.vito.lux

I just found out about while I was reading a thread on XDA. Never heard of it before, but it looks great.

Seems to give more control/better accuracy of brightness adjustments. Also, it allows you to reduce brightness below minumum levels that the phone limits you to. Doesn't look like root is required for that either.