Default Brightness problem

How do you guys set your slider ? For me its bit uncomfort, i set him on lowest and then tick auto brigt. but when i get out from home, brigtness is low, it makes move and little more brighter. I installed Lux lite and app is working perfect.
Device: LG G2
ROM: stock rooted 4.4.2 20F
Kernel: Dorimanx always lastest